Copy Glyphs within file in Glyphs Mini

How do I copy a glyph and all its associated data from one “slot” to another? For instance, I want the N in my dingbat font to be the mirror image of my A, which is already created. I can open the A, select all and copy, open the N, select all and paste, but then I have to set sidebearings, etc again. If I duplicate a glyph, I don’t know how to reassign it. I am stumped on this very basic question and have searched the manual and this forum to no avail. Thanks for helping a newbie out.

delete the “N”, copy paste the “A” and rename the “A.001” to “N”.