So, you're talking about perspective, basically "where it seems someone is looking from". You can control this, it's not locked-in to how it normally feels like it functions, even if it normally seems that way.

It just takes significant amounts of practice in directing and controlling your attention instead of letting it control you. There's a lot of ways to practice, but meditation regimens are probably generally one of the quickest.

Like, your internal dialogue for instance. Just because it's always on doesn't mean it has to be. But unless you can turn it off, the constant stream of dialogue through your head is going to make it very difficult to "look from" anywhere else. It'll always pull you immediately back so long as it is present.

When the wise man wants to feel himself in his toe, he hits it with a hammer.

So many different answers. I am not going to delve into the self as a concept or why I feel the way I do. I've always felt my awareness inside the head, but my sense of self is in the chest. So yeah, both of your examples ring true with me.

Under my blanket. No, my dog is sleeping on my legs.

I vary.

My oddest self is working. I operate a lot of automated machinery that are interactive, and many levels of recirculating materials. I have to zone in and become my machinery, feeling the vibrations, heat, smelling, and hearing the manufacturing processes and guiding the settings to keep as optimum as conditions allow. My day can turn very bad in minutes, it is that unforgiving of specs. I don't like being too public in what I do on the internet, but there are only a few handfuls of who operate at my scale throughout the world/ per my employer.

I can only compare it to a race car driver, or aerialist flyer in the mind/machine joining of sense of space.

I'm most of my self. There's a small part with severe nerve damage that, well, it's something else. I've given it a name. It kind of has a mind of its own. We exist.

My location is irrelavent. All you need to know it that I am 1 mile from your location and approaching rapidly.

I don't know how to work the body...