Determining algorithm to be used?

[Henry Andrew]

Hi,

If I encrypt a file, how can I determine which algorithm was or is used
to encrypt it?  Is it the first algorithm in the list of algos on my
key??

If I update prefs to make sure AES256 is first, will encryption
automatically use this algo??

I want to stop having to use --cipher-algo aes256 every time I encrypt.

Thanks!
 
--Andrew