diff --git a/README.md b/README.md
index dbf825d..b9427c7 100644
--- a/README.md
+++ b/README.md
@@ -10,6 +10,10 @@ Download, extract and rename the last Unifont tar.gz file (https://unifoundry.co
     tar -xvf unifont.tar.gz
     mv unifont-16.0.01 unifont
 
+Change the GLYPH_MAX_WIDTH variable from hex2otf.c to 64 and compile it with `gcc unifont/src/hex2otf.c -o hex2otf`
+
+    #define GLYPH_MAX_WIDTH 64	///< Maximum glyph width, in pixels.
+
 Draw glyphs in a pad following this format (hexadecimal identifier):
 
     F4910:
@@ -34,7 +38,7 @@ Run `padascii2uniascii` to download the pad's content and format it for the Unif
 
     ./padascii2uniascii.sh http://88.127.187.90:9001/p/qunifont > qunifont.txt
 
-Use the Unifont hex glyphs as a base file
+Use the Unifont hex glyphs as a base file 
 
     cp unifont/font/planee00/unifont-base.hex qunifont.hex
 
@@ -42,25 +46,29 @@ Convert uniascii to unihex and add them to the base file
 
     ./unifont/src/hexdraw qunifont.txt  >> qunifont.hex
 
+TODO: remove duplicate id
+
+    ???
+
 Convert unihex to bdf
 
     ./unifont/src/hex2bdf qunifont.hex > qunifont.bdf
 
-TODO: convert to OTF, add OpenType features, change metadata
+Convert unihex to otf, --help for format list
+    
+    ./unifont/src/hex2otf hex=qunifont.hex out=qunifont.otf format=truetype
+
+TODO: add OpenType features, change metadata
 
 ## Other useful commands
 
-Convert unihex to png (-p for plage)
+Convert unihex to png preview table (-p for plage)
 
     ./unifont/src/unihex2png -i qunifont.hex -o qunifont.png -p 0
 
 Convert unihex to sfd
 
-    ??? see https://www.venea.net/man/hex2sfd(1)
-
-Convert unihex to otf
-    
-    ./unifontsrc/hex2otf ??? 
+    ./unifont/src/hex2sfd < qunifont.hex > qunifont.sfd
 
 Print specific glyph in terminal from hexcode