Use the following steps to manage fields for a bundle:

1. Access your site.

2. In the left sidebar, click Structure.

3. Select the entity type for which you want to manage fields.

   For example, Content types, Media types, Menus, or Taxonomy.

4. Choose the bundle for which you want to manage fields.

   For example, Article in Content types or Main navigation in Menus.

5. Click the Manage fields tab.

   
6. To edit an existing field:
   1. Click Edit besides the field name.
   2. Make the changes based on your requirements.
   3. Click Save settings.
7. To add a new field:
   1. Click Create a new field.
   2. Choose a field type and click Continue.
   3. In the Label field, enter a name for the field.
   4. Complete the configuration for the field.
   5. Click Save settings.

8. To reuse a field that already exists on another bundle:

   1. Click Re-use an existing field.
   2. Choose an existing field from the list and click Re-use besides it.
   3. Configure any instance-specific settings.
   4. Click Save settings.

   Reusing fields ensures consistency across your content structure by providing a standardized framework for data management.