Correct key signature for horns

[Max_Wiberg]

I have a template for our hornsection in the band.
Trumpet - Tenorsax - Trombon.
With the Shift-K command - Write.- Create Key signature .
When I select the G major key I get that key for all three instruments.
Which I dont want .
Trumpet & Tenor ar e Bb-instruments - to write parts for them you write them in the key A-major. Then they will sound like G-major

But the Trombion is notataded then in G-major and wiil sounf like G-major

How kan I get that set up in Dorico properly

[asherber]

This is just a question of switching your view back and forth between Concert Pitch and Transposed Pitch.

When you set a key with the popover, that’s the concert key. If you then toggle the view to Transposed Pitch, you’ll see that transposing instruments have the correct key signature.

[Max_Wiberg]

Max here!
Many thanks

Cheers!