In older SolidWorks versions I could create a selection box within my sketches allowing me to select multiple entities (typically to delete). However in SolidWorks 2018 if I LBC and try to drag to create the selection box it just selects the entire outside closed drawing and begins to drag. How do I turn this off?

Selection box outside the sketch (2018)

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Selecting inside sketch (2018)

Creating a selection box in SolidWorks 2011. Notice it does not drag the entire outside sketch even though it's closed