Some suggestions: Select text, enlarge image, comment window

[EMU-TIME]

I hope to have the following features to make the software more perfect

It's MOBI and EPUB formats

Select text
enlarge image
comment window

[EMU-TIME]

You can select text if it is selectable PDF Reference

You can zoom in to make images enlarged but beware what you see in PDF is not what you may expect.

The comments window is similar to the MuPDF core engine

You can select text if it is selectable PDF Reference

You can zoom in to make images enlarged but beware what you see in PDF is not what you may expect.

The comments window is similar to the MuPDF core engine

Thank you very much for your answer. I'm sorry I forgot to mention the format. It's MOBI and EPUB formats, and SumatraPDF is currently the best reader I've found for these two formats on PC.

[GitHubRulesOK]

That's different but similar comments for mobi etc. You need to be using latest pre release and one problem sample per issue.
There were no comments system for epub/mobi (only experimental highlights long go before 3.2),
and thus there is no comments window for any format other than PDF based files such as AI converted e/PS or static XFA

Select text and copy text such as
मानव परिवारका सबै सदस्यहरूको अन्तर्निहित मान तथा सम्मान र

or zoom and copy pictures at original or larger / smaller.

[EMU-TIME]

My mistake was that I used the old version, but after using the new version, I encountered some problems, such as not being able to set the background and text color (black background and white text) of the text in darker mode, but this setting is effective in bright themes.

Another point I mentioned earlier is whether it is possible to click on the gaze icon like Kindle, such as [1], to display a small window instead of directly jumping, of course, this is a detail.

[GitHubRulesOK]

to INVERT colours pressing SHIFT + I usually works in PDF and others but beware all objects including images will be reversed unlike say older version 3.1.2 where mobi images AFAIK were kept separate from page colours. . No it was the same then, unless using non zoom and search. And no it is not very easy to go back to those older methods as now the files are fully handled by ONLY MuPDF code.

[EMU-TIME]

Thank you for your reply, GitHubRulesOK
I press shift+i to display a page number in the upper left corner of the reading area, and then press close
Version 3.5.2

[GitHubRulesOK]

You are using 3.5.2 as I see from the wooly icons so there it is not shift but just I and too easily accidentally pressed so 3.6 pre-release has better dark behaviours and need shift for forcing invert on/off

[EMU-TIME]

You are using 3.5.2 as I see from the wooly icons so there it is not shift but just I and too easily accidentally pressed so 3.6 pre-release has better dark behaviours and need shift for forcing invert on/off

Thank you, the issue has now been resolved.
However, there are still some new questions, how to set it to a rearrangement like 3.2?
I have a 1080p screen, and the current situation is that dual pages will be slightly higher than the screen. Pull it all the way to page 1, and then you have to pull it back to page 2. If you pull it all the way to page 1, it's easy to get over it.
It seems that the new version cannot set the text font yet. If you want to enlarge, you cannot read one page with a scroll wheel. And the text cannot fill the entire screen.
I may be a bit nitpicky, but I'm not in a hurry to make changes. After all, software authors are also very busy, and I hope the software gets better and better.