Know of any features or tips and tricks in OS X 10.7 (Lion)?

Kind of like this: Please share your hidden macOS features or tips and tricks but specific to OS X Lion 10.7.x ONLY

Do you know any hidden or little-known nice feature of OS X 10.7 (Lion)? It doesn't matter what it is—maybe just a short terminal command. Share your experiences on hidden OS X features here.

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Also provide details on how to achieve that feature, and if possible, include a relevant image too!

Solution 1:

Holding ⇧ and/or ⌥ while resizing a window retains the aspect ratio and/or anchors the windows center, respectively.

Solution 2:

Finder move is now similar to Cut and Paste

⌘+C to copy the file/folder (nothing new here).

⌘+⌥+V will then paste the file/folder at the new location, and delete it from the old location.

Solution 3:

To get into the contents of the user's now hidden Library folder.

While in Finder view click on the "Go" menu item, and then click on the ⌥ key - and you'll find the Library folder.

Alternately the Library Folder (or any other folder) can be unhidden with the command:

chflags nohidden ~/Library

in Terminal.app - to hide a folder, just use hidden instead of nohidden