I have a question concerning label placement in QGIS. I'd like to rotate every label by 180°. Therefore, I set the rotation value to 180 (I've tried different ones as well as different variable types) according to the description:
I also applied every combination of "Preserve data rotation values" (what does that actually mean?) checked/unchecked and Rendering->"Show upside-down labels" (each value). But all this seems not to have any effect on the labels. What am I missing?