+.TP
+\fB--threads\fR=\fINUM_THREADS\fR
+Number of threads to use for compressing data. Default: autodetect (number of
+processors). Note: multiple compressor threads are not very useful when
+exporting to a WIM with the same compression type as the source WIM, since
+wimlib optimizes this case by re-using the raw compressed data.
+.TP
+\fB--rebuild\fR
+When exporting image(s) to an existing WIM: rebuild the entire WIM rather than
+appending data to the end of it. Rebuilding the WIM is slower, but will save a
+little bit of space that would otherwise be left as a hole in the WIM. Also see
+\fB@IMAGEX_PROGNAME@ optimize\fR.
+.TP
+\fB--ref\fR="\fIGLOB\fR"
+File glob of additional split WIM parts that are part of the split WIM being
+exported. See \fBSPLIT_WIMS\fR.
+.TP
+\fB--pipable\fR
+Build, or rebuild, \fIDEST_WIMFILE\fR as a "pipable WIM" so that it can be
+applied fully sequentially, including from a pipe. See \fB@IMAGEX_PROGNAME@
+capture\fR(1) for more details about creating pipable WIMs. The default without
+this option is to make \fIDEST_WIMFILE\fR pipable if and only if it already
+existed and was already pipable, or was "-" (standard output).
+.TP
+\fB--not-pipable\fR
+Build, or rebuld, \fIDEST_WIMFILE\fR as a normal, non-pipable WIM. This is the
+default behavior, unless \fIDEST_WIMFILE\fR already existed and was already
+pipable, or if \fIDEST_WIMFILE\fR was "-" (standard output).
+.SH SPLIT WIMS
+You may use \fB@IMAGEX_PROGNAME@ export\fR to export images from a split WIM. The
+\fISRC_WIMFILE\fR argument is used to specify the first part of the split WIM, and
+the \fB--refs\fR="\fIGLOB\fR" option is used to provide a shell-style file glob
+that specifies the additional parts of the split WIM. \fIGLOB\fR is expected to
+be a single string on the command line, so \fIGLOB\fR must be quoted so that it
+is protected against shell expansion. \fIGLOB\fR must expand to all parts of
+the split WIM, except optionally the first part which may either omitted or
+included in the glob (but the first part MUST be specified as \fISRC_WIMFILE\fR as
+well).
+.PP
+Here's an example. The names for the split WIMs usually go something like:
+.PP
+.RS
+.nf
+mywim.swm
+mywim2.swm
+mywim3.swm
+mywim4.swm
+mywim5.swm
+.RE
+.PP
+To export the first image of this split WIM to a new or existing WIM file
+"other.wim", run:
+.PP
+.RS
+@IMAGEX_PROGNAME@ export mywim.swm 1 other.wim --ref="mywim*.swm"
+.RE