Does anyone know how to set up Pronterface to have a specific interface/arrangement on startup?

I have been able to set up the custom buttons/macros on my computer but whenever I restart the program the window sizing changes to make the graph section really small so I can't see all of my buttons.

Does anyone know of a way to preset the window sizes on startup?

Mine automatically saves the window position and the sizes of the individual sections on program exit. The settings are stored in your user profile directory in either .pronsolerc or in my quick test printrunconf.ini for the precompiled version.Yours may be different since I just compiled it into an exe myself but your user profile directory should hold the settings files. If you can't see them, make sure you can see hidden files.