In org mode I go to a subtree. This subtree contains lots of text, let's say a thousand lines. I want to look up some information in it. I got it, but now I want to collapse that subtree I'm in directly with a keystroke. That's all. But it seems that I need to go with the cursor to the heading before I can use TAB for visiblity cycling. Jumping to the heading takes time and is tedious. When I use TAB inside the subtree text nothing happens and I haven't found any other way to collapse the subtree directly.
I looked at the manuals and internet but I couldn't find any solution. Stackexchange is my last resort. Since I'm not a coder I can't help myself here programming a lisp function to solve the problem. Additonally I think this is useful also for other users and I would have needed it very often myself.