Is there a way we can place hidden text within our document? For example, if we scroll our mouse over an icon, phrase, etc. within our document, can we reveal those hidden written notes - or in any other way as not to clog our work. 
Insert/Comment not doing the trick?
I donât see an INSERT/COMMENT choice under: Edit -Insert: ? No âcommentâ choice.
Sorry, got my menus mixed up, itâs in the Format menu. Try selecting some text and then using that command. Itâll open up a box you can type into in the sidebar. You can read the text later on by hovering the mouse over the highlight.
Amber⊠Thank you. I got it! After researching, I see it is under âFormat - Commentsâ and it does exactly what I was seeking. Thanks!