First, start the Experience you would like to edit. On the toolbox menu you should see the Experience settings pop up after the Experience has started. By default, Edit Mode will be off until you select the pencil button.
If you have Objects on a node and you are in edit mode on that node, you can grab and move any Objects to update its spawn position offset.Use the Save button to save your changes on the node or the Reset button to reset the changes back to how the node was after changes were last saved.
You can also jump to a certain node by entering a node ID if there is a specific step you may need to test. To toggle the search box, click the first button in the Experience Edit Mode button bar.