[Feature request] Simple way to increase font size from within the GUI (or alternatively, via the relion-commandline, as a --flag)

[rubyFeedback]

Hello there,

Would it be possible to add a simple way to increase the font size, from within the GUI?

My eyesight isn't that great anymore (and I also now have a rather large monitor) and I in general increase the
font size of most applications, to not burden my eyes too much. Starting relion, the text is all fairly small by
default. I assume this can be changed globally (I did so for gtk-apps for instance), but if it would not be too
much work, would it be possible to add a simple button or arrow or plus and - symbol, to increase font size?

A tooltip should also be shown. As not everyone wants this, perhaps in the options-preferences this can be
disabled, so people who prefer the old way could retain the old way just fine, without having to see that

• / - symbols, or whatever is preferred. (The - symbol aka decrease font size, is not so important to me,
  but for synergistic UI a + and - should probably be offered at the same time).

Alternatively a commandline option could be used, e. g:

relion --large-fonts # or something like that; could then be the fonts at 150% compared to the default, or something like that

At any rate, thank you for reading this suggestion and perhaps considering it.

[biochem-fan]

Thank you very much for your feedback. Unfortunately, coordinates and sizes of many GUI elements are hard-coded and it is not trivial to add the scaling option. I welcome pull requests if someone looking at this thread works on it.

FYI:

You might want to try Doppio in CCPEM. This is an Web-based interface for RELION (and other tools). Being on a Web browser, you should be able to change the font size. Unfortunately, the license is not as free as RELION and I have never tried it myself.