If you are trying to make selections based on a certain type of object (i.e. bones, shapes, lights, etc) you can set the selection filter to that type and the viewport will disable selection on all other types of objects, making for easier selection. Comes in handy when setting up/testing rigs, when you don’t want to have to freeze your model geometry, but you can avoid accidentally selecting geometry by setting the filter to not include geometry. You can also choose Combos and select multiple choices, such as bones & shapes (rig controls).