hi there i have a little problem with my macbook mail app 
before i was able to just click on the messaje and on the bottom half of mail app is will appear but know i hace to double click and it wil apear on a new windows i dont like this format how can i change it back like it was before
before i was able to just click on the messaje and on the bottom half of mail app is will appear but know i hace to double click and it wil apear on a new windows i dont like this format how can i change it back like it was before