Add a Caption To an Existing Slide

## Can you think of a better caption?
Each slide can have more than one caption. Check out the current slide show and add a caption (or two).
If you need help, check out the Appendix in the training manual.

Open the current slide show and review the existing slides and captions; use the Appendix in the training manual if needed. Add one or two captions to an existing slide, then confirm the updated captions appear in the slide show.

Written by the indexing model from the issue text.