Allow object start points to be in the center instead of end point.

[thesuzy]

I would like to have my objects start at the center of the line instead of at the end point. Could you add a toggle to switch between these two options?

Example use case: I have arrows on a curved path traversing a map to show travel from point A to point B. Both points have a dot on them, not linked to a path. When linking arrows to the path, the script adds an arrow at point B, which doesn't look great underneath the dot for point B. I would like to be able to toggle this off somehow, without manually going to the layer palette to delete or hide that layer.