Method of copying a group from one image to another

I'm looking for a method whereby I can copy a pair of direction arrows labelled with N and E from one psd file (the stock file) to another psd file (the working file). As my first attempt to make a stock file, I have set up a transparent background image, and generated the arrows and labelled them. However, I find that none of these elements are copy-able (Edit>Copy of any type is disabled - greyed out). If I group them, the same situation exists.

Is there a way of doing this in PE 2022? I was hoping to have a stock file with these direction arrows and their labels set up so that all I need do is copy from this file into my working file. As I expect to have quite a number of these to do in the next 12 months (>15), it would be a lot more efficient to do it this way than to re-create the arrows for each working file.

My thanks in advance, Paul.