In the Legend of the Main Display window, the Layer Visibility checkbox to the left of each layer's label can be used to toggle the visibility of that layer. This checkbox can also be selected in the item's Layer Controls tab by selecting View->Visible. Visibility animation cycles through the visibility of each layer, showing them one at a time. This is not a time animation loop; it loops through the visibility of the layers present in the Main Display window.

The padlock icon on the right side of each layer in the Legend is used to block the effects of the visibility animation described above. When locked (), the visibility of the layer is not affected by the animation.

Visibility Animation can be invoked via the Layer Visibility Animations button. You can add this button to your main toolbar in the Toolbar Options tab of the User Preferences window.

Image 1: Animate Visibility Window

• - Begins layer visibility animation. Click this button again to stop the animation.
• - Makes the layer visibility animation loop slower.
• - Makes the layer visibility animation loop faster.
• Dwell (s) - Corresponds to the dwell rate of the layer visibility animation, or how long (in seconds) each layer is displayed before cycling to the next layer.

You can also access this tool in the Main Display window through the View->Displays->Visibility Animation menu item. In this menu, you can turn visibility animation on/off, and change the speed of the animation.

As an alternative to the Layer Visibility Animations tool, the function keys F1, F2, F3* can be used to cycle visibility as follows:

• The F1 key cycles visibility through all non-locked layers, looping through each layer one at a time.
• The F2 turns on all non-locked layers.
• The F3 turns off all non-locked layers.
• *On a Mac laptop, you may need to press the "Fn" key along with the particular function key.