Firstly, when previewing animations in Poser, untick the Skip Frames
I too always set
skip frames off. I use the tiny silver pinball button at the right end of the timeline... (shown "on" here)
Some other suggestions: If the animated scene previews too slowly, one can also temporarily click off any unnecessary lights.
The biggest single factor is probably preview display mode. If you're watching the preview to check timing and fluidity, then sacrifice color texturing and set the display to
hidden lines, for example. The preview display mode buttons look like several billiard balls or globes. The further left/up in the array of balls, the simpler and faster the display mode will preview.
You can also reduce the size of the document window while previewing, to help if playback is lagging.
A permanent improvement in preview playback can be gained by upgrading to a high performance OpenGL video card.