There are no parameters for the lengths of the pointer line.
Only the pointer starting angle.
So when you copy the settings, only the pointer line angle will be set.
I know it is 2 extra clicks, but use the 'detailed' placement method rather than 'simple'.
Then you get the pointer arrow exactly as you want it.
One of the forum moderators.
Versions 6.5 to 25
Dell XPS- i7-6700 @ 3.4Ghz, 16GB ram, GeForce GTX 960 (2GB), Windows 10
Dell Precision 3510 - i7 6820HQ @ 2.70GHz, 16GB RAM, AMD FirePro W5130M, Windows 10