It would be nice if an expression produces NULL - that the popup wouldn't even display a blank line. I know there is a way to do it in a table - but that messes up the inline formatting of non-tabled text.
If you're in the new map viewer, there's a lot you can do with Arcade. There's no reason a blank line needs to appear, but it really depends on how your expression is written.
@LCTechLogin I use TextFormatting.NewLine within all of my expressions so that if they are not null they will show on a new line. I just list all the expressions on the same line within my popoup so no blank rows show.
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