Change the Size of the iTunes Window
Lovely as iTunes is, it takes up a heck of a lot of screen real estate. When you're working on other things, you can shrink it down. In fact, iTunes can run in three size modes: small, medium, or large:
❶ Large. What you get the first time you open iTunes. (Hate the music hard-sell from the Genius Sidebar on the right side of the window? Close the panel by clicking the square button in the lower-right corner.)

❷ Medium. Windows folks: Switch back and forth between large and medium by pressing Ctrl+M or choosing Advanced→“Switch to Mini Player”. If you use iTunes on a Mac, click the green zoom button at the top-left corner (or choose Window→Zoom).

❸ Small. To really scrunch things down, start with the medium-size window. Then drag the resize handle (the diagonal lines in the lower-right corner) leftward. To expand it, just reverse the process.

Tired of losing your mini-iTunes window among the vast stack of open windows on your screen? You can make it so that the iTunes mini-player is always visible on top of other open documents, windows, and other screen detritus. Just open iTunes Preferences (Ctrl+comma/⌘-comma), click the Advanced tab, and turn on the ...