The dashboard contains widgets. Widgets can be moved by dragging them and dropping them where you want them.

Widgets on the "Shared" tab are visible to all users in the system while the "My dashboard" tab allows users to create a custom dashboard with only the widgets thery are interested in.

Add Widget

Click the Add Widget menu and choose the widget you want to add to the dashboard. The widget is added to the top of the first column of the dashboard.