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.

Review the current slide show to choose an existing slide, and consult the Appendix in the training manual if help is needed. Add one or two captions to that slide; done means the caption is visible in the slide show and the content reads well.

Written by the indexing model from the issue text.