Where do i put in the Key in for instrumental? N beat Tempo?

[Albert307320026p0r]

I been looking high n low lol not sure if adobe have the option to put the tempo for the beat in or the key for the best. Any suggestions 

[SteveG_AudioMasters_]

You have to bear in mind that Audition is an audio editing package, and not ideally suited to music creation. You can set a tempo in Edit>Preferences>Time Display, but there's nowhere you can set a key - simply because there's no need to. For the recording of acoustic music, Audition is key-agnostic.