Erractic Screen change on anim

[Sleuthgame]

Load https://www.randelshofer.ch/animations/anims/byte_by_byte/F-15.anim.html as anim. Change Screen format to 8 colors. Play Animation Hit Palette Screen palette display is back to 2 colors or erratic behaviour began until crash.

[mriale]

Added support for animation to the following:

• Picture/Screen Format
• Picture/Page Size

These menu items allow you to change these attributes for all the frames of an animation:

• screen mode
• resolution
• number of colors

It shows the frames as they are processing and has a progress bar.

I also added a button to the Color Keyframes requestor to allow you to set a global color palette for the entire animation.

By using these two features together, you can reduce the number of colors in an animation and then pick a global palette for the animation.

[Sleuthgame]

Great job ! Can't wait to test thoses new features.

[Sleuthgame]

Works great ! Anim5 upgraded to 16 colors, added a landscape with a background merge, saved as GIF.