Some objects and their elements are pre-installed in the database by developers or dealers, and in this case their deletion and editing is impossible or limited.
The icon of a pre-installed object has a red exclamation mark in the lower right corner. The name of a non-editable item is inactive and its value cannot be changed.

All other objects and their active items can be edited.

If you copy and paste a pre-installed object, you can then edit it. 

The item's Pre-installation property can have three possible values:

• System pre-installation – editing and deletion are not allowed. Selecting another option is impossible.
• Dealer pre-installation – editing and deletion are only available to the dealer and are prohibited for regular users.
• Non-pre-installation – editing and deletion are available to everyone.