Here is an how to add your own fold marker
http://forum.hippoedit.com/?/topic,482.0.html---
@Alex,
maybe it's an good idea to add an default fold marker to defaultText syntax
...\hippoedit\data\syntax\deftxt_spec.xml
like
<SCOPES>
<Scope open="HE_FoldRegion_Start" close="HE_FoldRegion_End"/>
</SCOPES>
and also add new items to the "Outlining" menu like
"Outlining > Insert FoldMarker Start"
"Outlining > Insert FoldMarker End"
"Outlining > Delete current FoldMarker"
"Outlining > Delete All FoldMarkerS"
so all users can immediately start using this feature.
_