Remember the spinny radar thingy in Longbow 2? Scan sectors sizes and off-axis settings for the Longbow FCR (Fire Control Radar)? No?
If you look at the heading tape of the screen-shot you'll see in the heading tape the "butt-cheeks" (two Ds back to back) on a heading of 225, off axis by 45 degrees. This indicates the direction the radar is pointing, as the FCR display is 'always up' in GTM mode. This can be a little disorientating and the radar footprint is mirrored on the TSD, this paints a clearer picture of where it's pointing. Failing that you can see the radome outside the aircraft turning as it seeks out the designated offset.
(And why are all our aircraft IDs Z666? We shall never know. If you have a TrackIR and explore the cockpit nooks there's even a Clint Eastwood reference in it).
Radar offset angle is set by clicking on either of the two LEFT RIGHT arrow buttons on the MPD or your designated sensor left/right control input when the FCR is your selected sensor. (If TADS is selected the sensor control steers TADS instead). NOTE: The offset can not be moved while the FCR is active, although you can queue movement by hitting the offset control then quickly cycling the FCR burst key. Got it?
It will be in the manual. Promise.