Load animation

If you want to load an already calculated animation:

• Write a prefix name for the sequence of images in the panel ``load animation'', example: vol_rend_ ( images will be read with the name: vol_rend_ + number_of_the_image + .vr).
• If you press on the toggle button ``save as pixmaps'' , images will be saved in XWindow servor as pixmaps. That's important if you want to replay the animation. Else if the toggle button is OFF, images are visualized then lost.
• Press ``Read xxx.vr files'' to read the loaded animation.

Then the ``animate'' panel becomes sensitive.