Logging Customizing Objects
Use
The analysis of logged customizing objects allows you to answer the following questions about customizing setting changes:
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who made a change?
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what was changed?
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when was the change made?
Logs are analyzed by object, that is, the changes can be shown in their customizing context, not just technically at table level.
Change logs can be deleted or archived. If you archive logs, you must ensure that the analysis includes the archived logs.
The analysis only applies to the logon client. If you want to see change logs for another client, you must logon in that client. Logs of cross-client objects are shown in every logon client.
Prerequisites
The analysis can only be used when:
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the Log Data Changes checkbox is set in the technical settings of the table, or the tables in the view, in the ABAP Dictionary
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the profile parameter rec/client is maintained.
Process
You can start the analysis of logged customizing objects from the IMG, the customizing menu, or the view (cluster) maintenance.
Analysis from the IMG
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Go to the IMG and choose the activity whose change history you want to see.
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Enter the period you want to analyze, and start the analysis.
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The changes are displayed as a list. The following information is provided for each change:
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Date and time
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Key field(s)
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Comparison of the old and new function field values, or message that the record is new or has been deleted.
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You can call detail and technical information for each entry.
Analysis from the customizing menu
You can call the analysis in the customizing menu via 
Tools 
IMG Logging
instead of from the IMG. Enter the name of the object or table in the next screen.
Analysis from the view (cluster) maintenance
The analysis can also be called from view or view cluster maintenance via Change Logs.