Macro or Shortcut to Insert +/- Symbol in Text Editor

Here's one that seems like it ought to be simple but is really stumping us.  I do a lot of documentation for manufacturing, and often have to put the (plus or minus) symbol inside an annotation.  I know how to do it; you go over to the sidebar and select the symbols menu, find it, click and it pastes in.  Or you type .  Neither is fast fun or easy.  I was trying to sort out how to write a shortcut to insert that symbol - maybe control  + shift + '+' or something, but the SolidWorks API seems to give up after you enter the text editor.  Anyone have any ideas on this?

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