Yes, they seem obvious...unless you don't know them.
---
toys/other/hexedit.c | 8 ++++++++
1 file changed, 8 insertions(+)
diff --git a/toys/other/hexedit.c b/toys/other/hexedit.c
index ff13b51..f6d5723 100644
--- a/toys/other/hexedit.c
+++ b/toys/other/hexedit.c
@@ -15,6 +15,14 @@ config HEXEDIT
Hexadecimal file editor.
-r Read only (display but don't edit)
+
+ Keys:
+ Arrows Move left/right/up/down by one line/column
+ Pg Up/Pg Dn Move up/down by one page
+ 0-9, a-f Change current half-byte to hexadecimal value
+ u Undo
+ q/^c/^d/<esc> Quit
+ All changes are written to disk on exit.
*/
#define FOR_hexedit
--
2.7.1
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