-\fB@IMAGEX_PROGNAME@ optimize\fR. Has no effect if the mount is read-only or if
-\fB--commit\fR was not specified.
+.TP
+\fB--lazy\fR
+Pass the \fB-z\fR option to \fBfusermount\fR, which performs a "lazy" unmount
+where the filesystem is detached immediately even if it is still busy. However,
+even with this option, \fB@IMAGEX_PROGNAME@ unmount\fR still waits for the
+filesystem to become unbusy; \fB--lazy\fR will only stop the unmount from
+immediately failing.
+.TP
+\fB--new-image\fR
+In combination with \fB--commit\fR for a read-write mounted image, causes the
+modified image to be committed as a new, unnamed image appended to the WIM
+archive. The original image will be unmodified.