Give a simple result about crystal report

since learn crystal report  three weeks,i meet some problem
1. first was  always show one row data, because i put feilds wrong area,
 not details but page heade
2.how to add a Hyperlink, if you want to add parameters, can add in x2
3.when use multi-tables ,  you'd  best use Command.
4.If you have too many primary keys, you can concat them together for one key :)
5. you can use  ShowProcessView.DisplayGroupTree = false; to unable GroupTree
some other points i foget, if next want to use, i can add them to here