[mp187]

Divergent mode is much easier for me. I just unfocus my eyes (the same muscle that blurs them).

[afandian]

I can easily diverge, but I then can't control focus. Do you see the stereograms in focus?

[dameyawn]

This can be practiced! I was super into stereograms years back and have decent control now (not intentionally but happened naturally). Can slightly diverge to see smaller/far-away images or maximally diverge for the bigger/close-up images.