I was working in Lightroom 3 and one day my brush adjustment markers were no longer showing up! I couldn’t for the likes of me figure out how to make them visible again. Well it turned out I accidently hit a shortcut key and disabled them. I was searching and searching for how to re-enable it. It turns out that Adobe calls these markers “Pins”. Therefor this post is more about how to make the adjustment “pin” visible again!
It’s very easy to do. You need to hit the “H” key. Bellow is an example of several "adjustment markers” when they are visible.
I found the key combo here: http://www.computer-darkroom.com/lr2_keyboard/lightroom-keyboard.htm