How Do I Go Back To The Old G Mail Layout?

I am driven mad trying to call up tools to forward and send my e mail
The send button does not appear on the page and my headers go after a while
The net result is that I have sent delicate e mails to the wrong people when trying to forward and I have resorted to copying and pasting again in to a new e mail – it is ridiculous as I loved the old system.
I hope that google see this and take iton board – I have nowhere to click where they suggest I do to give feed back. Any help appreciated……. I dont often use my yahoo account because of too much spam and unsolicted mails!!