Intelligence icon
Senses icon
Focus is an action performed by pressing the appropriate button when available.
Focus allows you to zoom in on a 
Point of Interest. This action is an important function of exploration.
Mechanics
Depending upon whether you use Intelligence or Senses, the icon for Focus will change. The function of Focus works in the same fashion though.
Enter Intelligence or Senses using the appropriate button. Rotate your view to find animals, clan members, items, locations within your intelligence or senses range.
Hover over a point of interest and the Focus action will appear. Press the appropriate button and your view will zoom into the specific point of interest you have selected.
You can then press the appropriate button to Identify the point of interest.
After identifying items, while still in intelligence or senses, you can then 
Memorize the point of interest so you can investigate it. Once a point of interest has been memorized, you can Remember or Forget the point of interest.
If you move, you can leave out of focus and your view will return to full color.
If you haven't inspected or discovered the point of interest before and it is unknown to you, you will only get a large question mark ? inside of the point of interest after trying to identify or discover it. You will have to inspect or discover the unknown point of interest up close and in person to learn what it is. From that point forward, when you use intelligence or senses and the related functions to find points of interest, you will automatically know what it is. You don't have to keep going up in person to inspect or discover the same point of interest.