Hello Reshma,
For selection Criteria--->
Go to SE54--> enter viw name -->Goto tab Selection Conditions--> write the conditions
For use of Events :
Go to SE54--> enter the view name ---> goto UTILITIES--> Table Maintenance Generator ---> Environment----> Modifications ----->Events----> New Entries---> here you can select the event 26 and write the condition code in the Editor ...
Regards,
Khushbu