Product view change history
there is not setting display Display Change Document(/SAPAPO/PROD_CD_READ)
as to whether there have other programe or table can display that?
If you have not activated
Activate Change Documents in IMG , system will not log changes .
First activate it in IMG than only you can see change logs.
Path for the same in IMG--
Advanced Planning and Optimization-> Product->Activate Change Documents
About table : Basically 2 tables CDHDR and CDPOS stores all changes to all kind of record.
once you activate changes in IMG you can see those changes in this table.