The Paste Markers command pastes overlay marker data, like photometry apertures, from the Clipboard into an Image Window. Marker Data must have been placed onto the Clipboard using Copy Markers in order for this to work. If multiple marker types are on the clipboard, only the most recently copied type are pasted.
Since markers result from procedures that use Command Toolbars, the Paste Markers command automatically activates the appropriate toolbar and command mode in the target window.
Copy and Paste Commands, Copy Markers