The incredable shrinking singers display...

[jdavia]

I gave all these causes as possible solutions. Because on my other computer when I run PhotoShop, and open several images at the same time for editing, the program can handle it for a while. But eventually the screens start to get smaller as you experience.

Are you letting windows set your visual effects or another choice.
Properties/Advanced/performance/settings. Go deeper to Visual effects/Advance. Mine is set to "Adlust to best performance". and in Visual effects/Advance, "Programs". To use the greater share of processor run time, and share of memory.