-<p>The last three of these options are always available by default, but the first depends on the presence of the EFI shell program file, as described earlier. To get the <tt>gptsync</tt> icon, you must install <tt>gptsync.efi</tt> and adjust the <tt>showtools</tt> option in <tt>refind.conf</tt>, as well.</p>
+<p>The last three of these options are always available by default, but the first depends on the presence of the EFI shell program file, as described earlier. Other ancillary tags may be present on some computers.</p>
+
+<p>To launch an OS or utility, you should select its tag and then press the Enter key or the space bar.</p>
+
+<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>
+
+<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>
+
+<p>On some computers, the firmware doesn't mount external USB media unless you adjust a firmware option or use the EFI's own boot manager prior to launching rEFInd. If you don't see external media appear in rEFInd's list, consult your computer's manual or examine its firmware to locate a relevant option.</p>
+
+<a name="boot_options">
+<h2>Adjusting Boot Options</h2>
+</a>