If you want to change the abap editor setting you need to go to abap work bench.
Use any of the following transaction and go in to the abap work bench.
SE38 –> Report
SE37 –> Function Builder
SE24 –> Class Builder
SE80 –> you can edit all programs from report to class module.
First on in to any one of the above transaction and click on the utilities–>Settings. See the following screen shot for old and new version.
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