in korganizer, in the date navigator sidebar, the fonts displaying
the day names (that is, "Sun Mon Tue ...") and the week number
(on the left side) are ridiculously large and completely out of proportion
with the rest of the display. (I have a very high DPI display that may
be causing the problem so I need to adjust font size)

Please, how to adjust the sidebar date navigator fonts (I can't seem
to find this in the settings options)?

thanks in advance

Can you post a screenshot through an image hosting service (such as imagebin etc.) and post the link here?

Would anyone like it to display only the initial of each day ?

M T W T F S S