-\fB@IMAGEX_PROGNAME@ append\fR must be the same as that of the existing WIM (and
-is automatically set as such).
-\fITYPE\fR may be "none", "fast", or "maximum". By default, it is "maximum".
-This default behavior is different from Microsoft's ImageX, where the default is
-"fast". \fB@IMAGEX_PROGNAME@ capture\fR instead gives you the best compression
-ratio by default and makes up for the slightly slower compression by being
-faster than Microsoft's software in the first place and using multiple CPUs when
-available.
+\fB@IMAGEX_PROGNAME@ append\fR must be the same as that of the existing
+WIM (and is automatically set as such). \fITYPE\fR may be "none",
+"fast", or "maximum". As of wimlib v1.5.3, the default is LZX compression, but
+in a special mode that is somewhere in between "fast" and "maximum" in terms of
+speed and compression ratio. Use \fB--compress\fR=\fImaximum\fR to explicitly
+request a better compression ratio at the cost of more time spent compressing.