Selecting the projected direction
The projected direction tells the Overview object to display members of the dimension in that on-grid position, either across or down, in its nodes. For example, if you specify the projected direction as down, and Total Region is the down dimension on the grid, then the members from the Total Region dimension appear on the nodes.
The names of the down and across dimensions are shown as tooltips if you hover over the arrow buttons.
To specify the projected direction: