Could be this is just me, but me-ness mostly seems to reside in discreet muscular tension that you unconsciously keep your attention on.
If you let go of the focus on that particular sensation, attention widens of its own accord. But it's a habit, and usually returns quickly.
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E.g. for me, I mostly seem to have some sort of unconscious attachment to a habitual "me" located in the area around my eyes.
If I let go of that tension (e.g. if I let my eyes glaze over slightly), it is no longer present.
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This feels a bit like taking a slight jaunt backwards in space, except nothing is moving.
It rather seems that when you don't have a forward-facing frame of reference, there is more proprioceptive awareness of everything behind your eyes (e.g. sensations in the back).
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Not taking the head as an absolute frame of reference means you're not really seeing "behind you" and "in front of you", as much as a spatial context that happens to include a body.
If you walk up real close to a wall, suddenly the world is "bigger" behind you.
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For those of us with normal(ish) eyesight, visual space has by far the highest fidelity of all the gross senses.
Hence, it's easy to take the eyes as an orientation point for your consciousness. But consciousness is much more expansive and interesting than that.
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Really subsisting in a state of not-all-headness takes some doing. And meditation training often seems counterproductive if that's a goal.
I tend to solidify the weirdness as a *really intense* object of focus, but then the weirdness just becomes the new, equally imaginary "me".
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Then you start noticing that your sensations are not what you think they are. That they are more digital than analog, have stops and starts.
There are cracks in everything. Tiny, almost imperceptible, but there. And that, as a poet once said...
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