Make sure the authoring perspective is being used. Method elements
can only be edited from within this perspective.
If you try to edit an existing element a dialog box will appear
with a message prompting you to check-out the appropriate library source file.
Select Apply.
As edits are made the tab at the top of the editing window will
display a "*" next to the element name. This indicate that changes have been
made but not saved at this point. When the file is saved through the File
- Save command the "*" will disappear.
Switch to the Resource perspective and check-in all changed
files.
Note: Be sure to check in all files in one batch. If this isn't possible
you must undo all changes.