You're only missing 1 step. After you make your selection, you need to separate it into it's own region. Press command E. Then, when you hit plus or minus, you'll hear a difference. Hope this helps.
Kevin
You're only missing 1 step. After you make your selection, you need to separate it into it's own region. Press command E. Then, when you hit plus or minus, you'll hear a difference. Hope this helps.
Kevin