The eFx ANH PCR helmet uses a ring mount design similar to that used in the eFx Limited/Legend to hold the mask and dome together in a single position. A mask ring fits within a dome ring with embedded magnets within both mask and dome used to help hold it in place.
Unfortunately, this prevents someone from changing to a different dome positioning without some modification. The original ANH used 3 tabs that snapped the mask and dome together (which often detached or were not centered in the same place). To recreate some of the various dome positionings seen in ANH, you need the freedom to rotate the top of the mask along the inside top of the dome to various positions.
Fortunately, this is easily accomplished with this helmet by removing the dome ring, which is held in place by just 2 small screws. Just remove the screws with a small Phillips screwdriver, and the dome ring comes right off. These screws only hold the dome ring onto the dome; they do not extend into the dome. So it doesn't impact the integrity of the attachment of the two left and right halves of the dome itself. When reinstalling the dome ring, do not reinstall the screws with any more force than slightly hand-tight as it would be very easy to strip the plastic threads.
Magnets are not in the dome ring, they are elsewhere embedded within the dome. So when you put the mask and dome together even without the dome ring, it will still snap to the same location. But you will have more freedom to rotate and offset in various directions, and the magnets will still generally hold it in place when moved to a slightly different position. This is fine for display, but for wearing, you'd want something more substantial to safely hold it in place.
In my opinion the widows peak is too close to the front of the nosebridge with the default dome positioning. Here I've added some foam padding (intentionally in a visible location to show it here) at the front behind the widows peak to increase this offset.
Which I think yields a better, more accurate look from multiple viewpoints:
And you can reposition the dome to the less-than-most-impressive positions that don't look very good but sometimes you'll spot on-screen: