I primarily use application icon to distinguish between different windows. I'm also used to the standard Windows "Alt-Tab" where application icons are slightly bigger.

As I understand it, there is currently no way to resize the application icon in the "Alt-Tab".
I've tried to resize the thumbnail using "Thumbnail Width" and "Thumbnail Height", but apparently there is no correlation between these sizes at all.

I would suggest to add either separate settings for the application icon size, or correlation between thumbnail size and application icon size.

I guess it doesn't work in my case because when I tried the 440x300, 400x260, 800x520 thumbnail sizes, the icons don't seem to be affected (I measured them relative to the cursor size, e.g. the height of the calculator app icon is the same as the height of the cursor in all cases)

Thank you!