UI: make answers easier to read

[lf-]

Hi!

In a math course, we are submitting LaTeX typeset documents, which are displayed far too small on the site, even on a very large screen.

See the (obscured) screenshot below from a 2560x1440 screen:

Even if I zoom in, the text isn't large enough to read since the PDF container is very small. It would perhaps be nice to have trimming (which chops off page margins) like LaTeX workshop does in its pdf.js implementation, but the main problem is that the container is too small.

Also, it would really help if the page layout was set up in a way that I could see the document I'm reading at full size while also seeing the feedback box on the same screen, so simply making the container bigger (as I experimentally did with a user CSS) doesn't solve this entirely. I think that a floating container to show the document being evaluated would be very useful.