You can make an alias for your macro. If you enter COMMAND ALIASES interface, in Express Tools, you can create a an alias and associate it with your macro. I have several of these in use for things like a "Super Purge and Zoom Extents" macro I made. I use the alias "Shift+P". I say this so you can see that you can also make the aliases not just alphanumeric, but also with combinations, such as Shift and Ctrl, plus a character..