[Lazarus] cannot show Code Explorer in new Lazarus 1.7

[Dennis]

I have some silly questions.
I recently upgraded to FPC 3 + Lazarus 1.7 but the interface is 
different from Lazarus 1.4.
1) now, there is only 1 window instead of separate window for Editor, 
inspector , Code Explorer, etc. Can I change it back to the old style?
2) I cannot show the Code Explorer. Clicking Menu->View->Code Explorer 
has no effect.
3) Menu->Source->JEDI Code Format (Formatter) is missing. How can I get 
it back?

Dennis
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.lazarus-ide.org/pipermail/lazarus/attachments/20160414/75b43340/attachment-0002.html>