Screens, Layers, and Animations Panel (Bottom of Builder)
At the bottom of the Builder is the Screens, Layers, & Animations Panel.
From here you can:
View and Add Screens – you can view screens by clicking on the screen name tab.
You can also click the + button to the right to add more screens.
If you have more than 3 Screens, arrow buttons will appear allowing you to to click on them and scroll through screens and each of their layers:
* You can select a screen and drag it/reorder the screens - this will automatically update the ordering numbers listed on the Screen tabs. (You should check any previous actions you have in case you need to update Go to Screen actions, etc.)
UPDATE: You can Rename Screens. Double-click on the Screen tab and rename:
Example:
Delete Screens – Click on the screen you want to remove, and click the X.
A window will show asking if you confirm the deletion. Press Delete, or Cancel:
Keyboard Shortcuts also apply - you can copy/paste from one screen to another (settings, position, etc.). See Keyboard Shortcuts article.
Layers – each layer (image, action, animation, etc.) will show for the screen you have selected and will have an eye icon next to it 
. To hide a layer click the eye icon.
From here you can:
View Layers – click on the layer and it will show as selected on the canvas as well as its corresponding properties will show to the right in the Properties panel.
Add Layers – you can add as many actions, assets, and layers as needed.
Reorder Layers – click and drag any layer to where you want it placed within all the layers on that screen - bringing the layer forward or sending backwards.
Replace/Swap Assets – right click on an asset layer and a “replace asset” button will come up – select it and the Assets window will show for you to choose an asset from or to upload.
Delete Layers – click on the layer you want to remove, and press delete on your keyboard. A window will show asking if you confirm the deletion. Press Delete, or Cancel:
UPDATE: You can Rename Layers. Double-click on the Layer and rename:
View Animations - If you have a layer with an animation/s it will show to the right of the layer.
From here you can:
Rewind, Play, Fast Forward, Loop Animation (or choose how many times it plays – 1x, 2x, 3x).
Edit Animation time – click on the left or right diamond shape and drag to make animation shorter or longer using the timeline ruler above it as a guide. You can also click the middle of the bar and drag the animation to change the start and stop points.
You can also right click on the animation layer and choose “Edit” which will bring up the below panel. Make your edits and click “Apply”:
Delete Animation – right click on the animation layer you want to delete:
Select “Delete” and a window will showing asking if you want to cancel or delete – make your selection:
Zoom in or Out – you can zoom the ad/canvas in or out (20-200%).
Note: If you have lots of layers you can click and drag the 2 bar icon in the center of the bottom panel up to be able to view everything.
