Use attribute margin-left to set
the left margin.
Source
<
fo:root xmlns:fo="
http://www.w3.org/1999/XSL/Format" >
<
fo:layout-master-set>
<
fo:simple-page-master master-name="simple">
<
fo:region-body/>
</
fo:simple-page-master>
</
fo:layout-master-set>
<
fo:page-sequence master-reference="simple">
<
fo:flow flow-name="xsl-region-body">
<
fo:block margin-left="20pt">
A block with left margin 20pt.
aaa aaa aaa aaa aaa aaa aaa aaa aaa aaa aaa
aaa aaa aaa aaa aaa aaa aaa aaa aaa aaa aaa
aaa aaa aaa aaa aaa aaa aaa aaa aaa aaa aaa
aaa aaa aaa aaa aaa aaa aaa aaa aaa aaa aaa
<
fo:block margin-left="40pt">
Nested block with left margin 40pt.
bbb bbb bbb bbb bbb bbb bbb bbb bbb bbb bbb
bbb bbb bbb bbb bbb bbb bbb bbb bbb bbb bbb
bbb bbb bbb bbb bbb bbb bbb bbb bbb bbb bbb
bbb bbb bbb bbb bbb bbb bbb bbb bbb bbb bbb
bbb bbb bbb bbb bbb bbb bbb bbb bbb bbb bbb
bbb bbb bbb bbb bbb bbb bbb bbb bbb bbb bbb
</
fo:block>
aaa aaa aaa aaa aaa aaa aaa aaa aaa aaa aaa
aaa aaa aaa aaa aaa aaa aaa aaa aaa aaa aaa
aaa aaa aaa aaa aaa aaa aaa aaa aaa aaa aaa
aaa aaa aaa aaa aaa aaa aaa aaa aaa aaa aaa
aaa aaa aaa aaa aaa aaa aaa aaa aaa aaa aaa
</
fo:block>
</
fo:flow>
</
fo:page-sequence>
</
fo:root>