Box Selection in SolidWorks is a useful tool for mass selection of multiple elements. Saving seconds of a simple task such as this can save you huge amounts of time in the long run. There are different selection defaults depending on the document type;
- Sketches and Drawings it will select all entities, dimensions and annotations
- Part Documents it will select edges
- An Assembly it will select constituent parts
Which way you drag the box controls the entities that are selected.
Dragging from left to right selects any entities that are completely surrounded by the blue box generated.
Using shift and box selection doesn’t deselect any but simply adds to the selection.