Use the screens in the background without losing focus on the principal

Whoever says that knows all the tricks of Mac OS X is a real liar is that there are so many tricks for both the user and the administrator of the system, which is sometimes almost impossible to remember and saberselos all.

This for example I read recently at Twitter and left me quite surprised. Did you know that you can interact with any program or window is not active at that time by a simple keyboard shortcut?

If for example we have multiple windows open the same program, or even multiple windows of different programs can interact with any of them without having to activate this screen. So we must press the cmd key while clicking with your mouse do the option you want.

Thanks to this shortcut can interact with any section / application / window without losing focus on the current window you're working. Only remark that the action is not compatible with all the options because, for example if the window opens a new tab, like Safari when you click a link, that window will be activated automatically, although with actions "passive" like opening a new tab.