-# option applies to ALL the volumes that rEFInd scans. If a specified
-# directory doesn't exist, it's ignored (no error condition results).
-# The default is to scan no additional directories.
+# option applies to ALL the volumes that rEFInd scans UNLESS you include
+# a volume name and colon before the directory name, as in "myvol:/somedir"
+# to scan the somedir directory only on the filesystem named myvol. If a
+# specified directory doesn't exist, it's ignored (no error condition
+# results). The default is to scan the "boot" directory in addition to
+# various hard-coded directories.
+#
+#also_scan_dirs boot,ESP2:EFI/linux/kernels
+
+# Partitions to omit from scans. You must specify a volume by its
+# label, which you can obtain in an EFI shell by typing "vol", from
+# Linux by typing "blkid /dev/{devicename}", or by examining the
+# disk's label in various OSes' file browsers.
+# The default is "Recovery HD".