Create a class from the preview

Let’s say that I have several fonts that have contextual replacements, and while checking in the preview panel (which replacements are suitable) I organize aside all the glyphs that I want to be in the class.
I would like to propose an improvement that it would be possible to select glyphs from the preview and create a class from them (with a friendly name) and thus quickly it would be possible to continue creating.

I will explain what you see in the picture:
You can see in “in” that a letter with a plus sign is written, followed by several letters.
And in the out, the first letter is replaced by a calligraphic letter, followed by several letters that the calligraphic letter will not get stuck in.
And I want to define a class with all these letters - easily.
צילום מסך 2023-12-06 134022.png

This might be a nice enhancement. Do you want it as a context menu item in the Preview are of the OpenType Designer?