How can I edit custom modules?

You can edit the custom modules created by you if required. 

To edit custom modules:

  1. Click Setup > Customization > Modules.
    All the existing modules will be displayed under List of Modules. 
  2. Move the mouse pointer to the required [Module] and click the Settings icon.
    Options to Edit[Module], Page Layout, Field Level permissions and Delete will be listed.
  3. Click the Edit [Module] link to edit the module name, and the profile permissions for it.
  4. Click the Page Layout link to edit page layout of the module.
  5. Click the Field Level permissions link to control the access of fields in the module.
  6. Make the required changes and click Save.