I’d like to make a visual overview of the glyphs in a typeface in the big window where one does the typing and editing (don’t know its official name, sorry), then generate a list of these grouped and ordered characters to make a filter in the other window (the one that has all the pigeonholes for the letters to live in).
If I understood correctly, you want to show specific glyphs in the font view (the one with glyph cells)? You can do that if you select what you need, right-click, copy glyph names and make a list filter. Here’s a tutorial about it https://glyphsapp.com/tutorials/adding-glyphs-to-your-font
In the window where you type some characters, after you have the letters you want do a CMD-A, right-click, Copy Glyph Names (one per line) to make a list filter.
I thank @alx and @George_Thomas for their perception. however, this does not work for me, personally, myself, as it refuses to list glyphs that have special names that I have made personally, by myself. sigh.