Where only one layer is available for a given study, deletion cannot take place until all entities of the layer have been reallocated to another layer. Since this is only possible with more than one layer, it is not possible to delete the final layer.
- In the Layers pane, click on the required layer to highlight it and click
Delete, and answer any questions that may follow. The layer is removed from the Layers pane.
Note: To recover a layer, click 
Undo or 
Action History.
Undo or Action History.