MACROMEDIA FLASH 8-USING FLASH Use Manual page 54

You cannot undo the following actions when using object-level Undo:
Enter Edit mode
Exit edit mode
Select unused library items
Select library items
Add library items
Delete library items
Duplicate library item
Modify library item
Modify library symbol behavior
Rename library items
Move library items
Edit library items
Import to library
Create font symbols
Create library folders
Expand all library folders
Create video stream symbols
Convert to compiled clip
JSFL library edits
Modify bitmap symbol properties
Modify sound symbol properties
Modify library item linkage
Convert to symbol
Create new symbol
Run JSFL command
Run JSFL file
Modify movie properties
Import
Create scene
Delete scene
Duplicate scene
Rename scene
Move scene
54 Working with Flash Documents