Visibility control at BC/View/Applet levels in Siebel

Hello ,
Siebel has given a huge points to configuring Visibility. mainly they are
1. Data level
2. View level
View level is control by responsibility.responsibility is collection of Views.
Data level is control by position .but a part from this
on BC level there are two properties : "Popup Visibility Auto All" & "Popup Visibility Type"
"Popup Visibility Auto All" : A TRUE or FALSE value.

If TRUE then if user has access to any "All" views, then pop-up visibility is All; otherwise pop-up visibility is determined by Popup Visibility Type property.

"Popup Visibility Type" :The type of pop-up visibility.

If null, then the default value of Sales Rep is used.According to ur position.

Same you can find properties in View and link .that also determine visibility rule.
Danish