Tab Pages
With the tab option, all the views are grouped together in the top margin of the planning area. If there is not sufficient space to show all views, the views that are not shown can be accessed over the left and right arrow buttons 
. The currently active view can be closed with the 
button.
Tabs can be grouped together horizontally or vertically by dragging one of the displayed views into the planning area of an active group using the mouse. On releasing the left mouse button, a context menu appears over which the type of tab group can be defined or the action cancelled.
The size of the displayed groups can be modified with the mouse at their borders.