fill column A B with Row Number, column C with random data
plot double Y (single layer)
click left axis, move red indicator to change scale
==> both axes is changed. In Origin 2023b, there are two kinds of position controls Y scale. The center area and corner area which split by 45-degree straight line go thought layer vertex. After this change, each corner control Y will control the related Y only. But if mouse is in center, it still controls both Y.