"New in Version 2.5.0" added to the User Guide.

doc/user_guide/en/new_features.adoc

@@ -1,15 +1,27 @@
 [[NEW_FEATURES]]
 === New in Version {VERSION}
 
-_WSJT-X 2.4.0_ introduces *Q65*, a new digital protocol designed for
-minimal two-way QSOs over especially difficult propagation paths.  On
-paths with Doppler spread more than a few Hz, the weak-signal
-performance of Q65 is the best among all WSJT-X modes.
+_WSJT-X 2.5.0_ introduces an enhanced Q65 decoder that measures and
+compensates for linear frequency drifts of Q65 signals.  Activate this
+feature by setting a spinner control *Max Drift* on the _WSJT-X_ main
+window to a number greater than 0.  We suggest a setting of 10 for
+submode Q65-60A, the recommended submode for EME on 50 and 144 MHz,
+which will accommodate drift rates up to 20 Hz/minute.  Similarly, we
+suggest *Max Drift* = 40 for submode Q65-15C, used for for 10 GHz QSOs
+(up to 900 km) via aircraft scatter and drift rates up to about 20
+Hz/s.
 
-Q65 uses message formats and sequencing identical to those used in
-FST4, FT4, FT8, and MSK144.  Submodes are provided with a wide variety
-of tone spacings and T/R sequence lengths 15, 30, 60, 120, and 300 s.
-A new, highly reliable list-decoding technique is used for messages
-that contain previously copied message fragments.  Message averaging
-is provided for situations where single transmissions are too weak or
-signal enhancements too sparse for a signal to be decoded.
+On the Windows platform only, _WSJT-X 2.5.0_ installations now include
+an early version of _MAP65 3.0_.  This program works together with
+suitable hardware that converts RF to baseband.  The hardware/software
+combination implements a wideband, highly optimized receiver for the
+Q65 and JT65 protocols, with matching transmitting features that
+require a standard SSB transceiver.  _MAP65_ is effective in both
+single-polarization and dual-polarization systems.  If two
+polarization channels are available, _MAP65_ determines and matches
+the linear polarization angle of each decodable signal.  This
+capability provides a major advantage for efficient EME communication
+on bands up to 432 MHz.  A single-channel _MAP65_ system works
+extremely well for EME on 1296 MHz and higher bands, displaying all
+signals in a 90 kHz sub-band and decoding all the Q65 and JT65
+signals.