Another option I would like to know (which would be more useful for my study) is if paraview can insert a caption, as if it were a scale of just one glyph saying how many m / s would be a glyph of that size.
As a workaround, you can have add a Calculator filter after your Slice filter. Set the expression to the name of the vector field variable. Now add the Glyph filter, and set the orientation array to the original vector array. You should now be able to color by the variable named “Result”, which is a copy of your input vector field.