2020.103 includes UI optimizations and stability improvements.
Besides many speed improvements, there's a subtle improvement .
It has to do with thumb building.
Thumbs will be rebuilt when you open a new folder or if you request a rebuild.
Then thumbs will scroll faster and have a stable size.
The bonus is the thumb will retain the size you selected.
To clarify, if you set your thumbs to medium on the main screen; see snap 007, It will keep that size regardless if you move the separator bar, or use the BLUE ARROW to see more thumbs. See 008.
The thumbs will show more when you shift the screen, but they stay the same size see 009
Right click on the blue arrow sets it back to default screen.
It's neat for me. My old eyes are older than I am.
Play with it, and enjoy
Fred