syslinux.txt: documented TAB keystroke

Documented TAB keystroke in syslinux.txt

diff --git a/doc/syslinux.txt b/doc/syslinux.txt
index a51b074..0713ca3 100644 (file)
--- a/doc/syslinux.txt
+++ b/doc/syslinux.txt
@@ -531,6 +531,7 @@ The command line prompt supports the following keystrokes:
 <Ctrl-V>       display the current Syslinux version
 <Ctrl-W>       erase one word
 <Ctrl-X>       force text mode
+<Tab>          list matching labels
 <F1>..<F12>    help screens (if configured)
 <Ctrl-F><digit>        equivalent to F1..F10
 <Ctrl-C>       interrupt boot in progress