You can use Auto Filter to create dramatic animated effects with bitmap filters. Auto Filter applies a filter incrementally to a series of cast members. You can use it either to change a range of selected cast members or to generate a series of new filtered cast members based on a single image. When you define a beginning and ending setting for the filter, Auto Filter applies an intermediate filter value to each cast member.

1. Select a bitmap cast member or a range of cast members, and select Xtras > Auto Filter.

   If you want to change only a portion of a bitmap cast member, use the Marquee or the Lasso tool in the Paint window to select the part you want to change.

2. In the Auto Filter dialog box, select a filter.
3. Click Set Starting Values, and use the filter controls to enter filter settings for the first cast member in the sequence.

   When you finish working with the filter controls, the Auto Filter dialog box reappears.

4. Click Set Ending Values, and use the filter controls to enter filter settings for the last cast member in the sequence.
5. Enter the number of new cast members you want to create. The text box is not available if you selected a range of cast members.
6. Click Filter to begin the filtering.

   A message appears to show the progress. Some filters are complex and require extra time for computing.

   Auto Filter generates new cast members and places them in empty cast positions after the selected cast member. If you selected a range of cast members, no new cast members appear, but the cast members in the range you selected are changed incrementally.