Visibility of follow up activities

Hi All,

within the webgui of CRM 2007, we can't figure out how to distinguish follow up activities within the account overview.

All activities are visible, but the user can't see or an activity is a follow up activity from an other activity or not. This was possible in the old GUI (transaction CIC0), it was possible to expand an activity and see the follow up activities.

Anybody got an idea how to solve this?

Kind regards

Immanuel