Creating slide decks - ideas for more content

[nomadscientist]

@GokceOGUZ @shrutikhare-git had some nice ideas for stuff that would be useful in the Creating Slide Decks tutorial

1. How to reference on slides (does this only appear at the end, so we can't credit individual figures, for example in a footnote?)
2. How to code in formulas (currently using screenshots instead!)

[hexylena]

assuming you are referencing this PR? #4620 agreed, the math needs to be documented. it should be the same as tutorials, but people don't necessarily look there for what syntax is allowed