Is there a way to temporarily swap the mouse Select button from Left to Middle, and then back to Left. I would like to do this within the ***AUX1 area of the Menu file while issuing the command. Here's more details: With the MBUTTONPAN system variable set to, 1 the RTPAN command works when I press the middle mouse button and, furthermore, I control the pan with the same middle mouse button. However, I want to assign mouse button commands via the AUX portion of my menu. In order to make the middle mouse button available for this, I have to assign the MBUTTONPAN system variable to 0. Unfortunately, this disables the RTPAN command from my middle mouse button. When I assign the RTPAN command to the middle button, manually (within the Menu, ***AUX1), the middle button calls up the RTPAN command with no problem; however, I am forced to use the Left button to control the RTPAN command. Is there a way to assign control of RTPAN back to the middle button without having to set the MBUTTONPAN system variable back to 1? Regards, J.Steed