When you choose a menu item with one of the menu buttons on a multibutton pointing device, AutoCAD LT receives not only the button number but also the coordinates of the screen crosshairs at the time you press the button. By carefully constructing the macros in the Buttons and Aux sections of the menu file, you can choose to either ignore these coordinates or use them with the command activated by the button.
As described in Pausing for User Input in Menu Macros, you can include a backslash (\) in a menu macro to pause for user input. For the buttons menus, the coordinate of the screen crosshairs is supplied as user input when the button is pressed. This occurs only for the first backslash in the menu item; if the item contains no backslashes, the coordinate is not used. Consider the following examples:
***BUTTONS2
line
line \
The first button menu issues an ordinary LINE command and solicits the From Point prompt in the normal fashion. The second button menu also issues a LINE command, but AutoCAD LT reads the current cursor location and uses it as the From point.