Keep your 2nd number the same.
Ex:
&zoom 132 121 to 130% in 0
@zoom 105 121 to 130% in 3
My y axis stays the same, keeping the zoom linear so that it smoothly moves to the direction you want. IF you wanted to zoom UP you would keep the 1st numbers the same:
Ex:
&zoom 132 121 to 130% in 0
@zoom 132 145 to 130% in 3