adjusting column width of choice table

[IF]

Any ideas on how I can specify the width of a choice table for PDF output?
I find the table much too wide (see attachment for screen capture of XMetal 6.0 author and resulting PDF).
Using XMetal 6.0 with XMetal Enhanced PDF via XRenderX XEP.
Thanks

[IF]

Changing the width attribute to "auto" in  the choicetable attribute set did the trick 

<xsl:attribute-set name="choicetable">
        <!--It is a table container -->
        <xsl:attribute name="width">auto</xsl:attribute>  <!--IF was 100%-->
        <xsl:attribute name="font-size"><xsl:value-of select="$xm.table.font-size"/></xsl:attribute>
        <xsl:attribute name="space-after.optimum">1em</xsl:attribute>
    </xsl:attribute-set>