With non-blinking cursor (QGuiApplication::styleHints()->cursorFlashTime() == 0), e.g. by entry "[KDE] CursorBlinkRate=0" in kdeglobals for the Plasma QPA, the shadow cursor marking the same spot in the non-input receiving half (char or values) is only hard to distinguish (1 pixel line width vs. 2 pixel line width) from the active cursor. Arek Guzinski proposals from bug 336607 comment #13: > I gave the insertion mode problem some consideration, and can think of 2 > possible solutions (although none of them feels perfect). > One would be to draw a 2 pixel in fg-color, 2 pixel bg-color alternating > line around the block (I'll attach a mockup). > The other might be to highlight the line in the active subview (like the > active line in kate). Mockup is attached over at bug 336607 attachment 134565 [details]