Photoshop Question

Miscellaneous Forums/General Discussion/Photoshop Question

When using Photoshop is it normal for the program to become increasingly slower when using multiple layers? I have noticed this mainly when trying to smudge things but other inputs, pen stokes (wacom tablet) seem to slow down too. I have a 1.5ghz system with 512mb, could getting more memory speed up operation or is it best to just use less layers?

Jason.