The Cell Browser is an excellent feature to quickly preview all loaded cells in workspace, without having to open each one into the ACE Viewer.
Note: This feature is only available when importing data that contains a hierarchy (ie. GDSII, OASIS, DXF).
Screen capture of Cell Browser
Notes/Links:
Double-click any item to open design in the editor.
Excellent feature for previewing designs in a workspace.
You can use the arrow keys Up/Down to scroll through designs.