1. Use Help menu > Help Topics.
2. In the left panel, at the top, type numbered files, then hit the Enter key.
3. A list of titles is displayed. Click the first title, Saving and exporting Movies.
4. In the right panel, click the subject named To export a movie as numbered files.
5. Then read the subject named To import numbered files.
Eventually, you'll probably need more information on Painter's Movies feature, so set aside some time to read the following:
1. Help > Help topics > Contents tab > Animation and Video (read all sub-topics).
2. Also take time to read the section on Scripting, listed on the contents tab just above Animation and Video.