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.

Start by reviewing the current slide show and the Appendix in the training manual to identify an existing slide that needs a caption. Add one or two captions to that slide, then confirm they appear correctly in the slide show.

索引モデルが issue の本文から書いたものです。