Use these steps to toggle on/off the localize reference lines on all viewports.
Step-by-step instructions
From the Graphic Rx toolbar, click the .
From the Graphic Rx toolbar menu, click Loc Ref Lines to turn on Localize Reference Lines.
The lines represent the location of the other two graphic planes. For example, the lines on the sagittal localizer image represent the locations of the axial and coronal localizer images. Figure 1. The vertical line represents the coronal slice displayed in the Graphic RX viewport and the horizontal line represents the location of the axial image displayed in the Graphic RX viewport
To turn off the localizer reference lines, click the Loc Ref Lines check box again. It is a toggle feature.