Working with PDFs: questions and answers

Question 1

How do I edit a PDF?

Accepted Answer

Open it in a PDF editor rather than a viewer: viewers only let you add notes, while an editor changes the text itself. In a classic editor you click into the text and retype it; in an AI editor you describe the change in plain words and only that text is rewritten, in place. OrujovAI's /pdf offers both ways, and every step can be undone. Keep a copy of the original and check each page before you download.

Question 2

How do I replace a word in a PDF?

Accepted Answer

Use an editor that replaces text in place, not one that drops a white box over the old word and types on top of it. Write the old and the new wording exactly, for example “replace ‘Baku, 2025’ with ‘Baku, 2026’ on every page”. On /pdf the surrounding words keep their exact position, and only a line that gets too long is reflowed. Afterwards, search the file for the old word to make sure no copy was missed.

Question 3

How do I remove text from a PDF?

Accepted Answer

There are three different things here: deleting the text, covering it with a white box, and redacting it. A white box only hides the words on screen; they can still be selected and copied, so use it for looks, never for secrets. To really remove something, use a delete or redact tool, then try to select or search for the removed words in the saved file. If they still turn up, they were only covered.

Question 4

How do I add text to a PDF?

Accepted Answer

Many free PDF readers have an “Add text” or “Fill & Sign” tool that places a text box anywhere on the page, which is enough for a note, an answer or a missing word. On a Mac, the Markup toolbar in Preview does the same. Text added this way sits on top of the page as a separate layer, so to change wording inside a paragraph you need an editor that edits the existing text.

Question 5

How do I change a number or date in a PDF?

Accepted Answer

Change the value in place with a PDF editor and name the page in your request, such as “change 12.05.2025 to 12.05.2026 on page 1”. Then check the whole document, because the same date often appears in a header, a table and a footer. Do this only on your own drafts and documents: changing figures or dates on an official paper such as a certificate, a bank statement or a contract someone else signed is forgery.

Question 6

Can I edit a PDF with AI?

Accepted Answer

Yes. An AI PDF editor reads the page, finds the words you mention and rewrites them, so “replace the old company name with the new one on every page” changes every occurrence. It handles page jobs (“delete page 3”, “add page numbers”) and black-outs (“hide every phone number”) the same way. On OrujovAI's /pdf each request is followed by a list of what changed; still check the result, because an unusual spelling can be missed.

Question 7

How can I edit a PDF online for free?

Accepted Answer

Many online editors are free for small jobs but limit the number of files a day, add a watermark or ask you to pay before downloading. Free desktop options exist too: LibreOffice Draw opens a PDF for editing, and Preview, built into every Mac, adds text, signatures and shapes. OrujovAI's /pdf editor is free and edits the file in your browser. Whatever service you use, don't upload passports, contracts or medical papers to a site whose privacy policy you don't trust.

Question 8

How do I edit a PDF on my phone?

Accepted Answer

For notes, highlights, filling in and signing, the free mobile apps of the big PDF readers are enough, and on an iPhone the Markup tool in the Files app adds notes and a signature without installing anything. Changing the existing text usually takes a paid app or an online editor that opens in your phone's browser like any website. Zoom in before you tap: on a small screen it's easy to edit the wrong line.

Question 9

How do I sign a PDF?

Accepted Answer

For everyday papers, draw your signature with a finger or mouse, or type your name in a handwriting font, and place it on the line; the Sign tool on /pdf does both. A signature made this way is just a picture, not a legal electronic signature. Under Azerbaijan's Law on Electronic Signature and Electronic Document, ASAN İmza counts as equal to a handwritten signature, and banks and state bodies often ask for it or for ink, so check what the receiver accepts.

Question 10

How do I sign a PDF online?

Accepted Answer

Online signatures come in two kinds: a picture of a signature placed on the page, and a certificate-based digital signature. The first is fine for a school form or an internal approval, while a contract or anything official needs the second, which proves who signed (in Azerbaijan that is usually ASAN İmza). Open such a PDF in Adobe Acrobat Reader and the signature panel shows whether the signature is valid and whether the file changed after signing. Any later edit shows up when the signature is checked, so sign only the final version.

Question 11

How do I fill in a PDF form?

Accepted Answer

If the form has real fields, click each one and type; most browsers and free readers can do this. If the lines are only drawn on the page, use an editor's text tool or an editor that finds the blanks for you; on /pdf you can type answers into both kinds and then lock (flatten) them so nobody changes them by accident. Save the file, open it again and check that the answers stayed.

Question 12

Can I fill in a PDF form without special software?

Accepted Answer

Usually yes: modern web browsers open PDF forms, let you type into the fields, and then download or print the filled copy. Preview, the Mac's built-in viewer, handles forms too. If the form has no fields, a browser can't add text, so you'll need an online editor with a text tool. Some official forms only work in Adobe Acrobat Reader; if you see a warning instead of the form, open it there.

Question 13

How do I black out a name in a PDF?

Accepted Answer

Use a real redaction tool, not a black rectangle or a black highlighter, which leave the name in the file underneath. Redaction deletes the text under the box. On /pdf you can drag a box with Redact or simply type “black out the client's name everywhere”; if a box covers a picture, that page is turned into an image so the hidden part is really gone. After saving, search the file for the name: if it's found, the redaction failed.

Question 14

How do I hide personal data in a PDF?

Accepted Answer

First list what counts: names, ID numbers (such as the FİN code on Azerbaijani IDs), phone numbers, addresses, card and account numbers, signatures and photos. Redact each one with a tool that deletes the text, and don't forget repeated places such as headers, footers and attached pages. Then clean what the page doesn't show: the document properties (author, title), comments, bookmarks and attached files, since names and numbers can hide there too.

Question 15

How do I reorder pages in a PDF?

Accepted Answer

Most editors have a page view with thumbnails you can drag into a new order; on a Mac, Preview's sidebar works the same way, and you just save afterwards. On /pdf you can also write the order in words, like “move page 5 to the start” or “put pages 7 and 8 before page 2”. Check the page numbers printed on the pages, since they won't update themselves.

Question 16

How do I delete a page from a PDF?

Accepted Answer

In any editor's page view, select the page, press Delete and save the file. Without an editor, use printing: choose Print, pick “Save as PDF” (or “Microsoft Print to PDF” on Windows) as the printer and enter only the pages you want to keep, such as 1-4, 6-10. That makes a new file without the unwanted page, but fillable fields and links may be lost along the way.

Question 17

How do I rotate a PDF page?

Accepted Answer

Be careful: the rotate button in many viewers only turns the page on your screen and isn't saved. To fix the file itself, rotate the page with an editor's page tools (or Preview on a Mac), then save or download the PDF. Open the saved copy again to make sure the page stays upright.

Question 18

How do I merge PDF files?

Accepted Answer

Use a PDF tool with a “merge” or “combine” function: add the files, drag them into order and save one new PDF. On a Mac you can open the first file in Preview, show the thumbnails and drag the other PDFs into the sidebar. Free online mergers work too, but pick one you trust for private documents, and check the page order before you send the result.

Question 19

How do I split a PDF into parts?

Accepted Answer

A split or extract tool lets you choose page ranges, for example 1-10 and 11-20, and saves each as a separate file. Without one, print to “Save as PDF” and enter just the range you need, repeating it for each part. If the parts are for email, splitting by size rather than by pages may be easier, and some tools do that automatically.

Question 20

How do I reduce the size of a PDF?

Accepted Answer

Most of a large PDF's weight is images, especially scans, so compressing it lowers their resolution and quality. Use a compression tool on a medium setting; on a Mac, Preview's Export dialog has a “Reduce File Size” filter, and Word can save a PDF at minimum size. For scans, rescanning at a lower resolution, around 200 dpi, in greyscale often saves more space than compressing the finished file.

Question 21

How do I convert a PDF to Word?

Accepted Answer

Recent versions of Microsoft Word open a PDF directly and turn it into an editable document: open the PDF in Word and confirm the conversion. Dedicated converters do the same and often keep complex layouts better. Simple text documents convert well, while multi-column pages, tables and forms may shift, and a scanned PDF needs text recognition (OCR) first.

Question 22

How do I convert a Word file to PDF?

Accepted Answer

In Word choose File, then Save As (or Export), and pick PDF; LibreOffice and most other office apps have the same option. On a phone, the Word app can share or save a document as a PDF. A PDF keeps the layout and fonts the same on every device, which makes it a dependable format for sending documents.

Question 23

Can I convert a PDF to Excel?

Accepted Answer

Yes, as long as the PDF holds real text rather than a scan. Excel for Microsoft 365 on Windows imports tables through Data, Get Data, From File, From PDF, and dedicated converters do the same. For one or two tables, you can also attach the PDF to an AI chat and ask it to rebuild a table as an Excel file; the OrujovAI chat can produce a downloadable Excel file, but compare every number with the original.

Question 24

How do I turn photos into a PDF?

Accepted Answer

On an iPhone, the Notes or Files app can scan pages straight into a PDF, and scan mode straightens and crops each page for you. On Android and Windows, select the pictures, choose Print and pick “Save as PDF” or “Microsoft Print to PDF”; on a Mac, open them in Preview and export as PDF. Put the photos in order first and shoot in good light, because a sharp page stays readable after compression.

Question 25

Can I turn a PDF into an image?

Accepted Answer

Many PDF tools export each page as JPG or PNG; on a Mac, open the PDF in Preview and choose Export. For a single page, a screenshot is often enough, and zooming in first gives a sharper picture. Choose PNG for text and diagrams, JPG for photos.

Question 26

How do I copy text from a PDF?

Accepted Answer

Choose the text-selection tool, drag across the text and copy it. If nothing gets selected, the PDF is most likely a scan, which is a picture of a page and needs text recognition (OCR) first. If the pasted text comes out as strange symbols or broken lines, the font inside the file is encoded oddly; paste it into a plain-text editor or ask an AI chat to fix the line breaks.

Question 27

How do I read a scanned PDF?

Accepted Answer

You can view it like any PDF, but the computer can't read its words until text recognition (OCR) turns the picture into text. Many scanner apps and full PDF editors have an OCR or “recognise text” option that adds a hidden text layer, after which you can search and copy. For a few pages, sending a clear photo or screenshot of each page to an AI chat that reads images works too.

Question 28

Can I translate a scanned PDF?

Accepted Answer

Yes, but the words have to be recognised first, either by running OCR and translating the result or by giving the pages to an AI that reads images. In the OrujovAI chat you can attach clear photos or screenshots of the pages and ask for a translation; it reads the text straight from the images. Check names, numbers and stamps against the original, since blurred or handwritten parts are easy to misread.

Question 29

How do I translate a PDF into Azerbaijani?

Accepted Answer

Upload it to an editor that translates inside the PDF, so headings, tables and page breaks stay in place, and say how you want it: “translate into Azerbaijani, formal style with siz, keep names and numbers unchanged”. On /pdf each block of text is rewritten where it stands, whatever language the document is in. Then check that names, numbers and terms came through intact; if the document goes to an official body, you may need a notarised translation.

Question 30

How do I translate a PDF and keep the formatting?

Accepted Answer

Copying the text into a translator loses headings, columns and tables, so use a tool that translates the document itself. There are two common routes: a document translator that keeps the layout, or converting to Word, translating there and saving back to PDF. Either way, expect some lines to wrap, because a translation changes the length of the text, and compare tables and page breaks with the original before you send it.

Question 31

How do I translate a large PDF file?

Accepted Answer

Work in parts: translate chapter by chapter or in blocks of 20 to 30 pages, because many tools cut off or skip text in very long documents. Before you start, make a short glossary of key terms and names and give it with every part, so the wording stays consistent. At the end, read the joins between parts and check that no page was missed.

Question 32

Can I translate a PDF book?

Accepted Answer

For your own reading, yes: translate chapter by chapter and keep a list of character names and terms so they stay the same throughout. Publishing or sharing a translation of someone else's book needs permission from the rights holder, because a translation counts as a derivative work. AI translation of literary text often loses style and wordplay, so anything meant for the public should be edited by a human translator.

Question 33

Can AI summarise a PDF?

Accepted Answer

Yes, if the PDF has selectable text; for a scan, run OCR first or send photos of the pages. Ask for something specific rather than just “summarise”: the main argument in five points with page numbers, the key terms, or the conclusions only. In the OrujovAI chat you can attach a PDF on the Free plan too; it reads the text of the first 40 pages in your browser and answers follow-up questions.

Question 34

How can I understand a long PDF without reading all of it?

Accepted Answer

Read the structure first: the table of contents, introduction, conclusion and section headings. Then ask an AI for a short summary of each chapter and for the three main questions the document answers, and read in full only the parts that matter to you. If you'll be tested on the text, use the summary as a map, not a replacement.

Question 35

How do I pull the main ideas out of a PDF?

Accepted Answer

Ask for a fixed format: “the main idea of each section in one sentence” or “five key points, each with a page number and a short quote”. Quotes and page numbers let you check quickly that the AI didn't invent anything. For study, also ask which ideas the author treats as most important and why, since that's usually what exam questions are about.

Question 36

Is there an AI I can ask questions about a PDF?

Accepted Answer

Yes, most AI chat assistants accept PDF attachments and answer questions about them, and some tools are built only for this. Ask precise questions (“what penalty does clause 7 set?”, “where does the author define inflation?”) and request a quote with each answer. Long documents may be read only in part, so if an answer seems off, ask about the specific page.

Question 37

What does “chat with a PDF” mean?

Accepted Answer

It means uploading a document to an AI and asking it questions in a conversation instead of reading the whole file yourself. The AI extracts the text, finds the passages related to your question and answers from them, often with page references. It works well with text documents and poorly with scans, and like any AI it can be wrong, so check important answers in the original.

Question 38

Is there an AI that reads a PDF textbook and explains it?

Accepted Answer

Yes. Attach the chapter you're studying to an AI chat and ask it to explain it simply, step by step, with an example, then ask it to test you. In the OrujovAI chat this works with text-based PDFs, and on /tutor you can attach the chapter as a PDF so Live Tutor builds a lesson from it and teaches it out loud on a board. For the best results, give it one chapter or topic at a time rather than the whole book.

Question 39

How do I make notes from a PDF?

Accepted Answer

Start from the headings, write down the key terms with short definitions, then add the main idea of each section in your own words. AI can draft this outline quickly (“make notes from this chapter: headings, terms, three key points per section”), but rewriting it yourself is what makes it stick. Finish with five questions about the text and try to answer them without looking.

Question 40

Can I make a quiz from a PDF?

Accepted Answer

Give an AI the chapter and ask for, say, ten multiple-choice questions, with the correct answers and a short explanation listed at the end so you can answer first. Ask for questions that test understanding, not only facts, and check the answers against the text, because AI sometimes marks a wrong option as correct. Taking the quiz again a few days later helps far more than rereading.

Question 41

How do I make notes from a textbook paragraph?

Accepted Answer

Read the paragraph once without writing anything, then note its topic, the new terms and two or three main points, and finish with one example or formula. A simple layout helps: a wide column for notes, a narrow one for key words and questions, and a two-line summary at the bottom. If you use AI, ask it to check your notes for mistakes rather than write them for you.

Question 42

Can I get a summary of a contract in PDF?

Accepted Answer

Ask for a structured summary: the parties, what each side must do, prices and payment terms, deadlines, penalties, how the contract can be ended, and anything unusual. AI makes this fast, but it can misread a clause, so check each point against the contract itself. Before uploading, remove personal data the summary doesn't need.

Question 43

Can AI review a contract?

Accepted Answer

It can help you prepare: explain legal wording in plain language, list your obligations and risks, and flag clauses that look one-sided. It isn't a lawyer, though, and it doesn't know every rule that applies to your situation. For a lease, a job or a loan with real money at stake, take the questions the AI helped you list to a lawyer.

Question 44

How do I read a research paper PDF quickly?

Accepted Answer

Read the abstract, then the figures and tables with their captions, then the conclusion; that tells you whether the paper is worth reading in full. Go to the methods only when you need to judge how reliable the results are. AI can explain unfamiliar terms and summarise each section, but take numbers and claims from the paper itself, not from the summary.

Question 45

Can I edit a table in a PDF?

Accepted Answer

You can usually change the text in a cell, because it's ordinary text in the PDF, but adding rows or columns is hard: the lines are drawn separately from the text. For bigger changes, convert the table to Excel or Word, edit it there and save it back to PDF. After any edit, check that the numbers still line up and the totals are still right.

Question 46

How do I add an image to a PDF?

Accepted Answer

Most full editors have an “add image” tool: choose the picture, click where it should go and resize it. On /pdf the Image tool places a PNG or JPEG anywhere on a page. For a logo or stamp, use a PNG with a transparent background so it doesn't hide the text underneath.

Question 47

Will a PDF look like the original after editing?

Accepted Answer

Usually very close, if the editor changes the text in place: untouched words keep their exact position and only edited lines move. Differences show up when a new line is longer and wraps, when the original font lacks a letter you added, or when a table cell gets tighter. Compare the pages side by side before sending, and keep the original file.

Question 48

How do I summarise a YouTube video?

Accepted Answer

Many videos have a transcript: open the description, tap “Show transcript”, copy the text and paste it into an AI chat with a request like “a summary in five points with timestamps”. In OrujovAI you can paste the link itself and ask for a summary, which returns an overview, the key points and a card to play the video; this is on the Plus plan and above, and paid plans are not on sale yet. Private, age-restricted or very long videos may not work.

Question 49

Can I learn what a long video says without watching it?

Accepted Answer

Mostly, yes. Check the chapters in the timeline and the transcript, or ask an AI for a summary with timestamps, then watch only the parts that matter. Summaries lose tone, demonstrations and anything shown only on screen, so for a lecture you'll be tested on, watch the key sections at least once.

Question 50

How do I turn a video lecture into text?

Accepted Answer

If it's on YouTube or a similar platform, use the built-in transcript, which you can copy in full. For your own recording there are transcription tools, and many phone voice recorders and video-call apps create a transcript automatically. Automatic transcripts make mistakes with names, terms and formulas, so fix those, then ask an AI to turn the text into tidy notes.

Question 51

How do I make notes from a YouTube video?

Accepted Answer

Copy the transcript and ask an AI to turn it into notes: headings, key terms, main points and a timestamp for each part. Then watch the hardest sections yourself and add the examples and diagrams a transcript can't capture. Finish with a few questions to test yourself, so the notes become something you can revise from.

Question 52

Can I summarise a webinar or podcast?

Accepted Answer

Yes, if you have a transcript or a recording. Many podcast apps and webinar platforms now show transcripts; otherwise use a transcription tool and paste the text into an AI chat. Ask for the key takeaways, any action points and the speakers' main claims, and check quotes before you repeat them, since automatic transcripts mishear words.

Question 53

Is it safe to upload a PDF to AI?

Accepted Answer

It depends on the service and on the file. Read the privacy policy (is the file stored, and is it used for training?), and don't upload passports, medical records or confidential contracts unless you must; if you must, redact what isn't needed first. On OrujovAI's /pdf the file is edited in your browser and only the page text is sent to plan changes, and OrujovAI states that it doesn't train models on your conversations.

Question 54

Is there a PDF editor in Azerbaijani?

Accepted Answer

Yes. OrujovAI's /pdf editor has an Azerbaijani interface, and you can write requests in Azerbaijani (“3-cü səhifəni sil”, “tarixi 5 oktyabr et”) as well as in Russian or English. The letters ə, ğ, ş, ç, ı, ö and ü come out correctly when it adds or changes text. The document itself can be in any language.

Question 55

Why does the font change when I edit a PDF?

Accepted Answer

A PDF usually stores only the letters of a font that the document actually uses, not the whole font, and sometimes none at all if it relies on fonts on the author's computer. When you type a letter that isn't in that set, such as ə or a capital the text never used, the editor has to use another font, so the new text looks a little different. Picking a close substitute (serif for serif, sans for sans) at the same size makes the change hard to spot.

Question 56

Can I put a password on a PDF?

Accepted Answer

Word on Windows can encrypt a PDF with a password in the PDF options when you save, LibreOffice's PDF export has a Security tab, and on a Mac, Preview's Export dialog lets you require a password; full PDF editors do it too. You can set a password to open the file and, separately, restrict printing or copying. Keep the password somewhere safe, because a strongly encrypted PDF usually can't be opened without it.