Hi,
I was facing the problem that I was unable to size the cells of my gridlayout. Tons of space around my text. My issue was really with height.
This was limiting the amount of stuff I was able to show.
Tried many solutions from the manual and forums. I never found ( understood) a combination of size, size_hint, texture_size etc that would actually work. My bad.
Googling I saw comments on an old github issue that solved my problems
use size_hint: (your choice, your choice) **AND**
size:self.texture_size
I do not know if this is a workaround or the right solution. The thread in github was challenging this as inflexible...thought it solves my problem.
FYI
JC