The Calculate Aspect tool creates an aspect map from an elevation data source.
The elevation layer from which density will be calculated.
In addition to choosing a layer from your map, you can select Choose Living Atlas Analysis Layer found at the bottom of the drop-down list. This opens a gallery containing a collection of layers useful for many analyses.
This is the name of the layer that will be created in My Content and added to the map. The default name is based on the tool name and the input layer name. If the layer already exists, you will be asked to provide another name.
Using the Save result in drop-down box, you can specify the name of a folder in My Content where the result will be saved.