Option 1: Include the Pause option in the Enter Preview Step. Make Go to Layout [home layout] the next and last step of your script. The script will pause in preview mode and clicking Continue or pressing Enter will return the user to Browse Mode and to the Home Layout.
Option 2: Do the same as 1, but don't include a go to layout step. Add a button set with the "hide when printing" option to the layout being previewed. When your leave preview mode, the button will appear and the user can click it to return to Home.
Option 1 worked great. Does the Go to Layout command always go to Browse Mode? I had made a Script to Go to Layout and then Enter Browse Mode. Are the two commands redundant?
Enter Browse Mode is often not needed, but Go To Layout does not alter the mode.