1. Select the tiles you want and go to the tools pull-down menu and click 'exit'.
2. Scroll your screen over and then back - voila, green exit-grid.
To make the grid pop up at the appropriate time use a trigger. Set the action to 'Toggle Exit Grid' and the condition to whatever.
Exit Grid Switch[]
To make an exit grid switch follow this
2. Click on entity and find the switch you want to use. Give it a 'Tag Name', 'exit' for example.
3. Create a new trigger with a new condition.
Object Script State of 'exit'
4. Create a new action.
Turn Exit Grids 'On'