Can I show tool tips in the hierarchy?
Sure. If you want to just show the item's display (assuming your layout may be too narrow to show the whole thing), use "HierrachyPortal::ItemDisplayCalc" as the definition of your tool tip (without the quotes).
If you'd rather show different information, you'll need to use a case statement to define the different contents for each level. Try a calc like this as your tool tip:
Case (
not isempty ( HierarchyPortal::Level1KeyCalc ) ;
"Replace this with the fields you'd want to show in level 1. Use fields from HierarchyPortalLevel1"
; not isempty ( HierarchyPortal::Level2KeyCalc ) ;
"Replace this with the fields you'd want to show in level 2. Use fields from HierarchyPortalLevel2"
; not isempty ( HierarchyPortal::Level3KeyCalc ) ;
"Replace this with the fields you'd want to show in level 3. Use fields from HierarchyPortalLevel3"
; not isempty ( HierarchyPortal::Level4KeyCalc ) ;
"Replace this with the fields you'd want to show in level 4. Use fields from HierarchyPortalLevel4"
; not isempty ( HierarchyPortal::Level5KeyCalc ) ;
"Replace this with the fields you'd want to show in level 5. Use fields from HierarchyPortalLevel5"
)