how to edit the first tiddler in the sight?

[imleg...@gmail.com]

I asked a similar question before which about edit the top tiddler in the whole page. 

It works fine. 

The code is 

<$navigator story="$:/StoryList" history="$:/HistoryList">

<$action-sendmessage $message="tm-edit-tiddler" $param={{{ [list[$:/StoryList]first[]] }}}/>

</$navigator>

But I want to change it a little bit. I want to edit the top tiddler in the sight. 

For example, I open 3 tiddlers, A, B, C is the order from top to bottom. But you cant see A in your sight top one is the B. So I want to use shortcut to edit the B tiddler. Any way to make it?