This is related to the question Showing arrowheads in line end using QGIS?
But I wanted to show the arrow head at the mid-point of a line. This is because the arrow heads can be quite crowded when they meet, e.g. at a common junction (as shown below).
My question is:
Is there a way to show the arrow head at the midpoint of a line (in general a certain percentage of length in linear referencing)?
(This is with QGIS 3.2.0-Bonn)