shastafir, on the old forums, also provided a great way to Execute a macro via the context-menu (right-clicking…)
Assuming you have EE version 6+:
* Click menu Tools > Customize Menus…
* Select “Context Menu” in the “Menu to Customize” list
* Select the desired location and click “Insert Above/Below/Right”
* In the Menu Properties dialog select “My Macros” in the Category list
* Select the desired macro in the “Commands” list
* Note: Unfortunately you cannot change the name of the command to something other than the macro name. (Yutaka, this could be considered a improvement request;) )
* Click OK a few times and test the right click