The designer menu bar is itemized here.
File
New Building
New Spacecraft
Open
Save
Save As
Import
3ds
STL
Export STL
Exit
Edit
Undo
Redo
Cut
Copy
Paste
Paste At
Paste Radial
Delete
Select All
Select Contiguous Faces
Select Edges
Select Faces
Select Vertices
Deselect All
Invert Selection
Align Selected Objects
Grab Selected Objects
Rotate Selected Objects
Stretch Selected Objects
Settings
Blueprint
Part
Face
Helpers
View
Help