Some tools are limited when you edit an assembly that is in Large Design
Review mode.
Insert Component
Insert Component adds components as
graphics-only in the top-level assembly.
The Make virtual and Envelope options
are not available.
For a top-level assembly that has multiple configurations, Suppress new components in the Configuration Properties PropertyManager controls the
suppression state of the inserted component.
You cannot add Toolbox components to the assembly.
You cannot insert multiple components at the same time.
You cannot insert components by using copy and paste, drag, or CTRL
+ drag.
Configurations
You cannot change the configuration of the top-level assembly.
Component Patterns
You cannot create or edit component patterns.
Mates
You cannot create mates to reference geometry. Existing mates to reference geometry
are solved.
Delete
You can delete only top-level components.
Suppress Components
Available for graphics-only components in the top-level assembly. Components are
suppressed only in the active configuration.
Save and Save As
Use Save to save an edited assembly in
Large Design Review mode. You cannot use Save
As.
Move with Triad
Move with Triad is available when you
right-click a component and click 
to expand the shortcut menu.