I'm not sure if anyone else finds this annoying but I can't stand being forced, when Mail is in full screen mode, to respond to an email on the same screen.
You know what I mean, right? If not, let me clarify.
When Mail is set to run in full screen mode it has its own desktop in Lion or Mountain Lion. So let's say you receive a new email. You three-finger swipe across to the Mail desktop and click Reply to respond to the email you received. At this point, the New Mail window appears above the main Mail interface which is greyed out and inaccessible.
But what if you want to copy and paste something from another email while you write? What if the email takes you longer than expected and more emails arrive while you write? It used to be that the New Mail window floated and could, therefor, be dragged to any location while you accessed your Inbox. Not in full screen mode.
Now, the standard process to get back to your Inbox when in full screen mode is to click Cancel, save a draft of the message, access the emails you want and then head back to editing your draft. Either that, or drop out of full screen mode and work that way. Not very efficient and pretty slow.
So today I tried something and, like most things Apple, "it just worked".
To retain full screen Mail use while having a floating New Mail window, all you need to do is select the message you want to reply to, swipe back across to your main desktop and hit CMD+R. The New Mail window now appears as a floating window on your desktop and you can access your Inbox as you would normally. Brilliant!
Perhaps people have been aware of this feature since full screen Mail was introduced but, for those of us who might be a bit slow on the uptake, I hope this will be of use.