document all options (including unimplemented ones).

1 files changed, 37 insertions, 8 deletions

diff --git a/uxd.rst b/uxd.rst
index 26cab62..0ffcd28 100644
--- a/uxd.rst
+++ b/uxd.rst
@@ -42,8 +42,26 @@ to a pager, try **less -R**.
 OPTIONS
 =======
 
--r
-  Highlight multi-byte sequences in reverse video, in the hex output.
+These options can be used on the command line, and/or in the
+**UXD_OPTS** environment variable. The command line takes precedence
+over the environment.
+
+-b
+  Bold output. This may be more or less readable, depending on your
+  terminal and its color settings. Ignored if **-m** given.
+  NOT IMPLEMENTED YET.
+
+-c nnnn
+  Set the colors to use. Must be 2 to 4 digits, from 0 to 7. These are
+  standard ANSI colors. The first 2 are the alternating colors for
+  normal characters, the 3rd digit (optional) is the color for non-printable
+  and space characters, and the 4th (optional) is for invalid UTF-8
+  sequences. Default: **2351**. This option also disables a prior **-m**
+  option.
+  NOT IMPLEMENTED YET.
+
+-h, --help
+  Print built-in usage message and exit.
 
 -m
   Monochrome mode. Uses underline, bold, reverse video instead of color.
@@ -56,6 +74,10 @@ OPTIONS
   if you can think of a reason to want it to be. Can be given in
   decimal, hex (with *0x* prefix), or octal (with *0* prefix).
 
+-r
+  Highlight multi-byte sequences in reverse video, in the hex
+  output. Ignored if **-m** given.
+
 -s position
   Seek in input before starting to dump. Positive *position* means
   seek from the start of the input. Negative *position* only works
@@ -65,9 +87,6 @@ OPTIONS
 -u
   Use uppercase hex digits A-F. Default is lowercase.
 
--h, --help
-  Print built-in usage message and exit.
-
 -v, --version
   Print version number and exit.
 
@@ -205,9 +224,19 @@ any files other than standard output. There's no config file.
 ENVIRONMENT
 ===========
 
-**uxd** doesn't read anything from the environment. It's *not* necessary to
-have a UTF-8 locale set in e.g. **LANG** or **LC_ALL**. Also, the **TERM**
-variable is not used.
+**UXD_OPTS**
+  If this is set, its value is treated as a set of options, which
+  get applied before any command-line options.
+  NOT IMPLEMENTED YET.
+
+**NO_COLOR**
+  If this is set (to any value), **uxd** runs in monochrome mode, just
+  as though the **-m** option were given. This variable is also
+  respected by **xxd**.
+  NOT IMPLEMENTED YET.
+
+It's *not* necessary to have a UTF-8 locale set in e.g. **LANG** or
+**LC_ALL**. Also, the **TERM** variable is not used.
 
 EXIT STATUS
 ===========