Tired of having to close panels?

For example, you double-click a line in the Find panel, and the cursor jumps to the main text window -- but the Find panel is still hogging half the screen, and you have to close it manually (or do Ctrl-F12)?

Click the Undock icon of an open panel (top right corner, hover over the icons for the tooltip that says "Undock"). Now, whenever the focus leaves the panel, it will automatically close.

To reopen, press Alt and the underlined number in the panel's tab.