I succeeded to get the correct orientation for the markers using the XML editor (Change 'Auto' to '0' in the marker properties)

However I'm still looking how to space markers in order to avoid markers overlapping, such hope someone knows that.

Hello everyone, I'm actually need to use inkscape to make graphics. I have a graphic with 4 curves corresponding to 4 different paths, as I need to export a greyscale image it is necessary to add markers to the different curves, allowing to differentiate them. My problem is that each curve is compos...