A small script for moving a pivot to its maximum and minimum position along the xyz axes with one mouse click.
Usage: Run the script with a hotkey and click above, below, or left, right of the original cursor position, the script uses the screen space to determine the offset and coordinate axis and will move the pivot point to the maximum or minimum position in the direction in which you clicked.
Installation: Drag the script file into the 3ds max window then find the ClickPivot tool in the hotkey editor and assign a hotkey to it.