This example uses a base-title "base" and a template: ActionCreateTiddlerWidget Template.

There will be new fields "aa" and "bb" which are added to the new tiddlers.

\define testCreate()
<$action-createtiddler $basetitle="base" $template="ActionCreateTiddlerWidget Template" aa="new field aa" bb="new field bb" />
\end

<$button actions=<<testCreate>> >
Create Tiddler
</$button>

Create Tiddler - Clicking this button will also open the Right sidebar: Recent tab