The steps depend on your user interface mode.
User Interface Mode
On the Session ribbon, from the Macros group, click Run Macro.
On the Reflection menu, choose Tools, Macro and then Run Macro.
Tap the Wrench icon and then under Macro, select Show Run Macro Dialog.
The options are:
Specify the Reflection Basic macro file (.rbs) that you want by selecting it from the list, typing the name in the box, or browsing to select it.
Files of type
The default extension is .rbs. Reflection appends the extension .rbs to the filename.
Enter any arguments that you want to execute in the script.
Choose to run the selected macro.