You can edit module items' names and indentation after they have been created.
Open Modules

In Course Navigation, click the Modules link.
Edit Module Item

Click the Options icon [1] and select the Edit link [2].
Edit Item Details

You can edit the item title by typing in the title field [1]. You can also edit the indentation level by selecting the indent drop-down menu [2].
Note: Changes made to one item will be made to all iterations of the item.
Update Item

Click the Update button.
View Module

View the changes to the Module item.