When you open TPG TeamManager, you will first see the Plan view on the Teams tab. All functions are on the Teams tab.
There are four views in TPG TeamManager which can be accessed via the buttons in the Views group of the menu bar:

Plan: Main view for your work: Planning and maintenance of absences, line operations and project commitments of the team members
Matrix: Assignment of the team members to projects in a matrix view
Report: Graphical reports on resource utilization
Settings: Adjustment of number formats