The Tips - Mac Kung Fu - page 237

Right-Clicking for Definitions
In some apps, you can right-click a word and select the Look Up option from
the menu that appears. Alternatively, you can highlight a word and click the
application menu and then click Services→Look Up in Dictionary.
Using Keyboard Shortcuts
In some apps, you can hover the mouse cursor over a word and then hit
CONTROL + COMMAND + D to see a pop-out window showing the definition of the word
(see Figure 37, Looking up a word instantly , on page 239 ). This works largely
in built-in OS X apps like Safari.
Gesturing for Word Lookup
If you use a multitouch trackpad, you can also hover the mouse cursor over
a word and tap with three fingers bunched together (tap, not click!). This will
cause a pop-out window to appear, showing the definition along with a The-
saurus lookup (if one exists) and a Wikipedia entry (again, if there is one for
that word). To get rid of the pop-up window, just click anywhere outside of
the pop-out. Looking up words this way takes some practice to do right, and
it can take a few seconds for the pop-up to appear.
By clicking any of the headings in the pop-out window, such as Dictionary,
Thesaurus, or Wikipedia, you'll instantly be switched to the Dictionary app
showing the relevant entry for that word, with the window scrolled to the
Dictionary, Thesaurus, or Wikipedia section, depending on which heading
you clicked.
Tip 211
Turn Off Download “Quarantining”
Whenever you download a file using a web browser, your Mac might warn
you when you first open it that it could be dangerous because it's from an
unidentified source. It'll tell you when you downloaded it and from where.
This is known as quarantining and can get annoying after a while, especially
if you download files only from sources you know are safe.
Qurantining is separate from the Gatekeeper feature of OS X (see Tip 50,
Install Any App Without Being Blocked , on page 55 ), which means that even