PICKAUTO system variable
Specifies automatic window selection (inside or crossing) while selecting entities. The value is stored as a bitcode using the sum of the values of all the selected options. A negative value is the same as 0, but helps storing the earlier value.
-7 to 7
Negative: disables window selection
1: Draws a selection window if the mouse is not over any entity when clicked
2: Draws a selection window if the mouse is clicked and dragged over an entity
4: Draws a selection lasso if the mouse is not over any entity when clicked