-<p>To launch an OS or utility, you should select its tag and then press the Enter key. If you press the Insert key, rEFInd will show a menu that may hold additional options, depending on the OS type. The following figure shows the submenu for Mac OS X. You can use this menu much like the main menu; move the cursor to select the option you want to use, then press the Enter key to launch the boot loader with the selected options. Press the Esc key or select <tt>Return to Main Menu</tt> to return to the main menu. You can also press the Insert key again to edit your boot loader options. A simple text-mode line editor opens, enabling you to move a curso back and forth in the line with your arrow keys, delete text, and type in new text. If you want to boot with your edited options, press the Enter key. If you decide you picked the wrong entry, press the Esc key.</p>
+<p>To launch an OS or utility, you should select its tag and then press the Enter key or the space bar.</p>
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+<p class="sidebar"><b>Note:</b>On UEFI-based PCs, rEFInd defaults to scanning for EFI, but <i>not</i> for BIOS, boot loaders. If you want to launch BIOS-mode OSes from rEFInd, you must edit the <tt>scanfor</tt> line in <tt>refind.conf</tt>, as described on the <a href="configfile.html">Configuring the Boot Manager</a> page. On Macs, rEFInd scans for BIOS-based OSes by default, since such configurations are a common way to launch Windows on Macs.</p>
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+<p>Ordinarily, rEFInd displays tags for OSes it finds on internal hard disks, external hard disks (including USB flash drives, CF disks, and so on), and optical discs. Sometimes, though, the firmware hasn't had time to fully examine these devices by the time rEFInd starts; or you might only insert or plug in the media after rEFInd appears. In these cases, you can press the Esc key to have rEFInd re-read its configuration file and re-scan your media for boot loaders. This action can take a few seconds to complete, so be patient. You can also use this feature to detect OSes if you launch a shell and use it to load a driver or edit the <tt>refind.conf</tt> file. If you regularly need to press Esc, you might look into the <tt>scan_delay</tt> configuration file option, described on the <a href="configfile.html">Configuring the Boot Manager</a> page.</p>