Please add a "CALLOUT" that has a place for text on one side and a single line projecting out of it to the right/left/up/down (almost like an ice-pick). This would be useful for spreadsheet captures where you need to highlight the fact that something is missing, and where you can position the line in between the rows (etc.) where it should be found. Right now I have to use callout arrows with text. But they are a little cumbersome to get exactly in the right place and make it clear what you mean to say.