by holding down the Option key. The preference in this case is which way to rotate the image: If the user changes the default rotation direction in the Preferences to clockwise, holding down Option will make the button rotate counterclockwise instead, and vice versa. It is common for such controls — that is, those whose behavior is governed by a preference — to be invertible in this way Common keyboard navigations In text areas, the Option key can be used for quick keyboard navigation. – navigate to the previous/next word. Windows equivalent: – navigate to the head/end of current paragraph. Terminal equivalent: Windows equivalent: Home/End – navigate caret up/down a page. Without the Option key, the keys let the page view scroll up/down a page without moving the caret. Windows equivalent: Alternative mouse actions When keeping the Option key pressed when using the mouse, the mouse action can change behaviour option-mouse clicking an application other than the current one, automatically hides the current application and switches to the clicked application. When dragging an item (file in the Finder, or layer in Adobe Photoshop, for instance), keeping Option pressed will make sure you Duplicate something instead of moving it. File downloads In browsers such as Safari and SeaMonkey, the option key can be used to download a file. Pressing down the option key when hitting return in the address bar causes the URL-specified file to be downloaded. Also, pressing the option key when clicking a hyperlink causes the link target to be downloaded. Besides the option key methods, other ways of downloading includes right-clicking (or ctrl (^) clicking, in Macs) a hyperlink to bring up a context menu, then selecting the appropriate download command, or pasting a URL directly into Safari's Downloads window. Miscellaneous Some applications make unique uses out of the option key: Terminal (including at least version 1.4.6 – no longer true as of 2.0.1, works.) – arrows navigates between open Terminal windows in a loop. Usually, programs use and , which are also supported for Terminal. Scroll bars (including at least OS X 10.3.x) – Option-clicking a scroll bar arrow can cause the view to jump to the next page instead of moving by a few lines. Option-clicking in the scroll bar can cause the view to jump to that position instead of jumping to the next page. This behavior can be reversed in System Preferences: Appearance. Startup