I am obviously being very dense about this but please bear with me!
I am using V1 at present and ben trying to get to grips with using adjustment layers for editing my wildlife photos. As I understand it an adjustment layer has its own mask and when I watch YouTube videos by renowned experts this mask seems to appear as a separate icon in the layers panel. So far I have been unable to reproduce that, no mask icon appears (I have attached a screenshot of what I mean) I can highlight the subject and indeed make adjustments to that selection and paint on it to reveal the other layer but I expected a mask. Is that the mask in the adjustment, if so why no icon as shown in the videos?
I am clearly missing some thing fundamental or have entirely misunderstood, I would be grateful for some advice, obviously, given my confusion this needs to be a clear description!