SAP provides us with fixes to SAP code through OSS notes that we implement. During upgrades we make changes to code using SPAU. There are various reasons why customers make modifications but how do we list them so we can see what we have done?
Use transaction SE16 and table SMODILOG to view the modifications. The diagram below shows details like the object that was changed, the user that changed it and the transport request that it was in. It will also list the applicable OSS number if it was done via that method.