Drag and drop artwork is now also in for the next release, so adding your existing icon set should be much quicker.
You can drag PNGs from your file manager straight into the Application Icons dialog on Linux, macOS and Windows. Drop one onto the default artwork preview to set the default, or onto an individual size card to supply artwork for just that size. A valid target highlights as you hover over it.
A few details worth knowing:
- Artwork dropped onto a size card must match that slot's exact square dimensions. Studio will not resize it, since artwork prepared for a particular size should be used exactly as authored.
- Dropping onto the default preview accepts any valid PNG and generates the other sizes from it, so that is the quickest path when one file covers everything.
- Folders, files that aren't PNGs and dropping several files at once are rejected with an explanation, and nothing changes when a drop is rejected.
- The Choose Default... and Choose PNG... buttons remain available and still share the session's remembered folder mentioned earlier in this thread.
Full details are on the feedback page: Drag and drop PNG artwork into the app icon editor