Blackcrusader
Contributor
I've only had my TG-6 for 1 trip and am not an experienced photographer, so someone please correct me if I am wrong. Green box from a half press is your auto-focus, which as mentioned above, is essential, especially when in super macro, IME. Another thought, if you are not able to maintain position long, is to try the sequence (burst) shots that can be achieved through a setting and then holding down the shutter button. Maybe not the most elegant solution, and you'll wind up with a ton of shots to delete, but may be useful when it's not possible for you or subject to remain stationary.
Photo stacking and sequence burst not really the best option for underwater at least for me. Pretty much l the photos I took the critters are on the move. Except for the octopus.