Oracle e-series - Figure 3-13 Front and Rear Views of the Base Station E-Series Base; Figure 3-14 Base Station E-Series Rotate Button

Installing and Operating the Tablet and Base Station E-Series 3-17
Figure 3-13 Front and Rear views of the Base Station E-Series Base
Pressing and holding the Rotate Button allows you to change the orientation as required.
The figure below shows an example of the adjustable tray in the Portrait position.
Figure 3-14 Base Station E-Series Rotate Button