The Info Palette is a hidden gem. To leave it open all the time, which we recommend, choose Window>Info or press Cmd+2 (Ctrl+2). Then, when you apply an effect, take a gander at it. Many effects print helpful information in the Info Palette. For instance, Particle Playground lists the current number of particles on the screen, and the 3D Channel effects list Z-depth information about any pixel you click. The only caveat is that you must bring up the Info Palette before applying the effect. If you bring it up after, you won't see the effect's info.