Hi,
1. Go to t-code OAYZ
2. Select the entire row against depreciation area 50
3. Go to emnu: Edit >> Change Field contents
4. Select the values to be changed and clickthe 'Tick' mark (e.g. Dep.area deactivated - select the row)
5. It will ask for new value. Key in and the values will be changed.
Hope the above solution helps.
Note 738919 - IT Depreciation for Assets
Regards,
Sanju M S