Hi there. You can use this technique to copy the XML button definition below onto one of your toolbars as a new button, which you can click on and then enter in a title for the current lister only:
<?xml version="1.0"?>
<button backcol="none" display="both" label_pos="right" textcol="none">
<label>Set Lister Title</label>
<icon1>#listerproperties</icon1>
<function type="normal">
<instruction>set listertitle={Rs|Enter the title for this lister...}</instruction>
</function>
</button>