<$button ><$action-sendmessage $message="tm-new-tiddler" title="Title"
text="some text..." tags="slide {{!!title}}"
/>New Tiddler</$button>
\define mybutton(param)
<$button>
New Tiddler
<$action-sendmessage $message="tm-new-tiddler"
title="Title"
text="some text..."
tags="slide [[$param$]]"
/>
</$button>
\end
<$macrocall $name="mybutton" param={{!!title}}/>