why is  the parameter of pageSize   available in report but not available in  rest api view record  ？

   Here is example:

1.     the parameter " pageSize=4 "below is not available. the   json  return  contain all records.

https://creator.zoho.com.cn/api/json/productv3/view/ProductLook?authtoken=****&zc_ownername=<appownername>&scope=creatorapi&raw=true&pageSize=4  

2.       the parameter " pageSize=4 "  below is available. the view will only show 4 records.

https://creator.zoho.com.cn/<appownername>/productv3/#View:ProductLook?pageSize=4