The Initial Moves window - to give details only about that (but see also #130) is rather small on my main PC - it looks like this:

(I show that Initial Moves window against something other than the main LucasChess window, because when I open the Initial Moves window, the main window disappears.)
Also, on a laptop (with x2 HiDPI scaling, if that matters, and running LucasChess under Wine), the Initial Moves window is, if anything, slightly smaller! The smallness of the window make it hard to use.
Thank you for LucasChess.