The top button beside every sub topic in a subject should move to it's position in TOC. This helps to easily shift between various topics in a subject.
Even though the feature which am suggesting can be obtained by using Bookmarks feature. But I think using Bookmarks in PC is easy when compared to mobile. So this feature becomes useful for people who are viewing the PDF in mobile.

The Hyperlink of General Aptitude: Verbal Aptitude https://gateoverflow.in/questions/general-aptitude/verbal-aptitude is leading to Page not found.

Can we get an ETA for the updated version of GO PDF?

The Hyperlink of General Aptitude: Quantitative Aptitude https://gateoverflow.in/questions/general-aptitude/quantitative-aptitude is leading to Page not found.

For example in GO PDF, if we scan the QR Code shown in the above screenshot we move to https://gatecse.in/combinatory/ . It would be great if there is a hyperlink for the above QR Code so we can move to concerned website easily in desktops/mobiles without scanning the QR Code.

So my suggestion is to add hyperlinks for all the major topics which are total 11 in the Volume 1 PDF.

If I scan above 3 QR codes available on cover page of Volume-1 following webpage is being displayed for all 3 QR codes:

I think the order of questions should be year-wise and the solution should be understandable because sometimes students by seeing voting they also vote. Please verify solutions by a subject expert.

If I hover over either Matrices or Determinants, hyperlinks are same.
Matrices hyperlink should be https://gateoverflow.in/tag/matrices and Determinants hyperlink should be https://gateoverflow.in/tag/determinant

From the above screenshots, you can see that we when we hover over Syllabus: Random variables, Uniform, Normal, Exponential, Poisson and Binomial distributions. Mean, median, mode and standard deviation the hyperlink is https://gateoverflow.in/tag/statistics and when we hover over Conditional probability and Bayes theorem the hyperlink is https://gateoverflow.in/tag/conditional-probability

For only Conditional probability and Bayes theorem, hyperlink is correct for remaining it is wrong.

By clicking on Discrete Mathematics: Set Theory & Algebra we move to hyperlink https://gateoverflow.in/questions/mathematics/discrete-mathematics/set-theory%2526algebra
This page is not found on gate overflow website.

The hardcopy available still contains Question paper till Gate2021 only. please do revise the content atleast in softcopy

We can move from major topic to TOC by clicking the number beside major topic and if we click on title of major topic we move to corresponding tag in gateoverflow site. Finding the option to move to TOC is very difficult because if we click on number beside sub topic or if we click on titles of sub topic it moves to same i.e., corresponding tag in gateoverflow site whereas clicking on number beside major topic and title of major topic is doing a different operation. This leads to confusion.

So my suggestion is to add top button beside every major topic and hyperlink it to TOC so that there will be no confusion.

In volume 3, starting 65 / 830 pages only available; remaining pages are blank.

If I click on either title of answer or top button beside every answer we move to concerned question. So, I think top button beside every answer is redundant. So, it's better to remove it.

Suggestions: As per gate syllabus divide the topics as chapter wise and inside it , there will be topic wise ,

Add 3 hyperlinks for 3 QR Codes on cover page https://gateoverflow.in/ , https://t.me/gateoverflow2022 , https://www.facebook.com/groups/gateoverflow/ respectively.
This helps to easily move to concerned website in desktops/mobiles.

In the current PDF, we can directly see the solution by clicking Answerbutton but there is no way to only know the key of a question. So add Answer Key button after every question and hyperlink it to bottom answer key. Why adding this might be useful is because when someone solves a question and if a person just wants to know the key to verify whether his answer was correct or not then this feature can become useful and if key doesn't match then that person can try that question again whereas if we click Answer button, solution will be revealed and that person might not try that question again because entire procedure to solve the question has been already revealed.