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 identify an existing slide that needs a caption, then consult the Appendix in the training manual if clarification is needed. Add one or two suitable captions to that slide and confirm the updated slide show displays them correctly.

Scritto dal modello di indicizzazione a partire dal testo della issue.