There currently is a limited support for font-se changes once a session started.
If the font supports unlimited sizes, I's like to be able to use Shift-KP_PLUS and Shift-KP_MINUS like in xterm to grow/shrink font size. This is very useful when using elvis in presentations or screen-sharing (zoom/teams sessions).
Related issue is that the '_' sometimes is invisible in some resolutions with some fonts on some font sizes (yes, that is explicitely vague as I found no al-ways-reproducing test case), and this is regardless of the setting for aasqueeze, though I think that allowing negative values for aasqueeze might fix that