To look at and fill the view with all objects in a scene
You can also choose
from the main menu, or press Shift+A, to frame all objects in all views.View fit may have problems with some joints, where it will zoom out too far.
By default, this value is set at 95%. You can adjust this value to determine how closely the camera should zoom into the objects when framing selected or all objects. Adjust this default Fit factor value in the Preferences window (Windows > Settings/Preferences > Preferences), Settings sub-section, Cameras section.