Picks or unpicks individual objects, alternatives, groups or layers of a reference file, or the whole reference file, in the view window.
Specifies at what level you are picking within the reference file. Choose between: Component, Layer, Object, File, or Alternative.
When set to Object, the tool picks the root node of a group when you select a reference object in the canvas.
If the Pick Level is Component, you can refine what type of objects can be picked by selecting these options.
By default, they are all selected.