Basic selection is done with the left mouse button.
By holding down the Ctrl key and clicking on additional models you can add to your current selection.
Shift + mouse drag Box select
Alt + mouse drag Box deselect
Ctrl + A Select all
Selection can also be done via the Object list.
If you have a question about something that isn't covered here, check out our additional resources.
And if that doesn't do the trick, you can send an inquiry to firstname.lastname@example.org or through the button below.