How To Rearrange Layers
-Click on the item on the right hand side and drag it up or down to the desired layer
-If you are unsure where the item is on the layer panel, click the specific item on the canvas to highlight the item in the layers panel, and drag it up or down to the desired layer
When you create a new slide, the layer panel will have a fresh start showing no layers. Every slide will have its own layer panel.
How to Rearrange Slides
-Select the slide on the left-hand side, and simply click and drag the slide to the desired position