Cross-reference lines are displayed for better correlation of the anatomy when browsing series with different image planes (e.g. Magnetic Resonance study). They are visible as yellow lines that mark the intersection of the image planes.
Cross-reference lines are always displayed in inactive panels (those with gray title bars) as a reference for the image in the active panel (brown title bar).
To change the reference source, activate the other panel by either clicking on its title bar or the image it contains.
Cross-reference lines can be switched off and on by clicking the Cross reference lines menu item or by using Ctrl + F12 .
