@Vinnie-M said in Double-click select highlight only cursor occurrence?:
I just expect to see only one thing highlighted
If you look carefully, the highlights are different. There’s the light-green for the smart highlighting, and a different color for the selected text. Of course the “different color” is a blended version of the light-green and the selected text background color, but that’s because a double-clicked word is selected and smart-highlighted simultaneously.
for example, 3 different markers for blocks: circle vs. square
Well, for this you mean folding markers. This type of thing is provided because the underlying component supports it; Notepad++ developers had to code very little to achieve folding, so they probably felt that they needed to do some amount of work. :-) Other settings are similar; someone else coded it, and Notepad++ developers just allow their users to turn it on/off.
I think it would also be appropriate to ask “is there a setting to do this or not do that”
Yes, of course, certainly. Ask away.