diff --git a/lib/77bit/77bit.txt b/lib/77bit/77bit.txt
index 8854ddcf0..5abe2050d 100644
--- a/lib/77bit/77bit.txt
+++ b/lib/77bit/77bit.txt
@@ -1,9 +1,10 @@
-Proposed new message types have a 77-bit payload.  For most purposes
-these are interpreted as 3 bits (i3) for "message type" and 74
-information bits.  Any message type that uses fewer than 74
-information bits can assign the remaining bits to define message
-subtypes. For example, Type i3=0 uses 71 information bits and the
-remaining 3 bits, here called n3, define 8 subtypes.
+Starting with WSJT-X 2.0, the FT8 and MSK144 protocols convey a 77-bit
+payload.  For most purposes these bits are interpreted as 3 bits (i3)
+for message type and 74 for user information.  Any message type that
+uses fewer than 74 information bits can assign the remaining bits to
+define message subtypes. For example, Type i3=0 uses 71 information
+bits and the remaining 3 bits, here called n3, define 8 possible
+subtypes.
 
 ----------------------------------------------------------------------------------
 i3.n3 Example message                    Bits           Total  Purpose
@@ -33,6 +34,9 @@ In case we need them, later:
 NB: three 74-bit message types and two 71-bit message subtypes are still TBD.
 ----------------------------------------------------------------------------------
 
+The 28-bit fields normally used for callsigns are configured rather
+differently from before.
+
 Facts about the 28-bit integers used to encode standard callsigns:
   2^28              = 268,435,456  Available values
   37*36*10*27*27*27 = 262,177,560  Used for standard callsigns
@@ -43,13 +47,13 @@ Facts about the 28-bit integers used to encode standard callsigns:
                         2,063,592  available for CQ, CQ nnn, CQ xxxx, QRZ, ...
 
 
-Further details:
+Further details on message types:
 -----------------------------------------------------------------------------
 i3.n3
 -----------------------------------------------------------------------------
 0.0 Free text, up to 13 characters.
 
-0.1 DXpedition mode as developed for KH1/KH7Z.
+0.1 DXpedition mode, as developed for use by KH1/KH7Z.
 
 0.2 Report, QSO serial number up to 4095, 6-character grid, and Roger
     for EU VHF contests.