Preferences -> Code Editor -> Format -> Advanced Format
versus
Preferences -> Code Editor -> Format -> Advanced Format -> Custom Format
As I understand, both are alternative options to (re)format code in SQL Developer, where Advanced Format bases on .xml and Custom Format bases on .prg.
It seems, that the Advanced Format is the default, which is used when pushing Ctrl+F7.
How can I deactivate Advanced Format and activate Custom Format now?