In the desktop editor, multiple cursor can be added at the same time by Ctrl-<click>. I know some people really like it but TBH it is the single editor feature that I absolutely hate… I use Ctrl a lot and it is occationally sticky when I use my mouse. I’ve lost countless number of code/note (jupyter + joplin) because of this, especially when the second cursor isn’t even visible on the screen…
Anyway, I am not going to argue against the use of the feature but I hope this is enough evidence that this is one of the features that can be really annoy for people that don’t use it so there should be a way to disable it. (Features that won’t get accidentally triggered or has no bad sideeffect are very different.)
And some related discussions from codemirror http://codemirror.977696.n3.nabble.com/How-to-disable-multiple-selections-cursors-td4028362.html https://discuss.codemirror.net/t/how-to-disable-multiple-selection/2291 which seems to suggest that codemirror adds this capability between 2014 and 2019… I’m not sure about the editor joplin uses…
FWIW, even a hidden option or having to edit a configure file manually would work for me… As long as it doesn’t require patchig the program itself for a systemwise installation.