hmm, big armchair you say. considering big enough to hold me all.. actually probably sit sideways and one foot inwards, under my butt. if it is comfy on that particular chair. If not maybe sit normally and both feet under me, but I probably can't stay like that for too long.

I'm afraid I don't understand the question. What can you change about the sitting position that would be non-standard

Loaf mode

comfy low

across armrests

I'm having a vaguely difficult time imagining what "standard" sitting positions are, but for a big leather chair with armrests, it's gotta be the spread, all limbs go everywhere. This is my chair and my chair alone.