You can adjust the nesting level of slides to organize multilevel navigation in your presentation with the Promote and Demote buttons.

To increase and decrease the levels of nesting, you can also click on the green arrows next to a slide. If the arrow is not active, then this action can not be performed. Available levels will increase each time you move a slide to a subsequent level. For example, when all the slides of your presentation are assigned to the top level (1), you can add only one nested level (2). Once you move any slide to Level 2, you will be able to move the following slides to Level 2 or 3 and so on. The maximum nesting depth of your presentation may reach eight levels. You can collapse and expand nested slides using the - and + icons to the left of a top level slide.