Set Client to Modifiable

Problem

You’d like to perform workbench or customizing changes on a client, but the client is not modifiable.

Open transaction SCC4
Double click on the client you’re trying to modify the objects on
Enter edit mode
Depending on whether you’re trying to modify client-depending or cross-client objects, follow either of the following steps and save afterwards.

In “Changes and Transports for Client-Specific Objects”, change the radio button from “No changes allowed” to one of the following values:

Changes without automatic recording: Changes can be performed, but will not be added to a transport request automatically. You can add changes to transport requests manually if desired.
Automatic recording of changes: Changes can be performed, and you will be prompted for a transport request on save (except for some edge cases which default to local customizing, like Fiori Launchpad Designer).
Changes w/o automatic recording, no transports allowed: Changes can be performed, but you are not allowed to collect them in transports.

In “Cross-Client Object Changes”, change the dropdown to either of the following values:

Changes to repository and cross-client customizing allowed: Changes to workbench objects and client-independent customizing can be performed.
No changes to cross-client customizing objects: Changes to workbench objects can be performed, but changes to client-independent customizing are not permitted.
No changes to repository objects: Changes to workbench objects are not permitted, but changes to client-independent customizing can be performed.
No changes to repository / cross-client customizing objects: Neither changes to workbench objects nor changes to client-independent customizing can be performed.