Hi, I just did something ( maybe I minimize it ), and the scene composer properties, the one that normally shows at the right of the opengl preview, desapers.
I tried to restart the jdk and could not fix it, I could not find any option to restore it back, there is anyway to reset it ?
What about CTRL+SHIFT+7?
Yep, it works, thanks friend ! Where did you find this info by the way ?
Nevermind, I founded this on the show window, I dont know how I didnt notice that, I must be working too much 
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Window → Properties. There is a hotkey hint at right.