and where to setup the default view methords..by "thread " & by "table"..??

In the admin's area.

another i suggest you put right "bbcode" block to left or another place just when we input over we 'd use "tab" key to focus on "OK -Submit" but now when use "tab" it's focused to "bold" in "bbcode"

@Alex
Maybe it's possible to add tabindex="1" to the 'Preview-button' and tabindex="2" to the 'Submit-button'?
tabindex is a valid atribute for <input> (see SELFHTML)...
By this the focus would be forced to the preview first - which is an often 'forgotten' feature...