ngraham added a comment.
One of the things I loved about macOS when I was a user was how many little hidden accelerators like this were sprinkled throughout the OS. You don't find them unless you go looking, but once you've found them, they're indispensable. There was a whole website I used to follow back in the day to learn about even more of them: https://hints.macworld.com/ I don't think this would be too non-discoverable anyway; I was actually surprised that a double-click //didn't// function this way the first time I tried it. Double-click on a grid element to select + apply seems fairly natural to me at least. REPOSITORY R119 Plasma Desktop BRANCH new-kcms-apply-on-double-click (branched from Plasma/5.15) REVISION DETAIL https://phabricator.kde.org/D18571 To: ngraham, #vdg, #plasma, broulik, ndavis Cc: davidedmundson, ndavis, plasma-devel, jraleigh, GB_2, ragreen, Pitel, ZrenBot, lesliezhai, ali-mohamed, jensreuterberg, abetts, sebas, apol, mart