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For 2D Graphs, it's on Size/Speed tab of Layer level of Plot Details dialog. When this option is selected, X and Y axes will be forced to
Graph layer can be set to isometric scaling so the axes will have the same length in pixel for pixels for the same scale increment. The check box will be hidden when the scale is not linear.
linearized scale range. When the layer is resized, the aspect ratio will be maintained.
Thus for the above example, X axis spans from 0 to 100 and y axis spans from 0 to 50, isometric scaling will result in a layer with X axis twice the length of Y axis.
For 2D graphs, the control can be found in the Size/Speed tab at the Layer level of Plot Details dialog.
For 3D graphs, it's on the control is on the Axis tab of at the Layer level in of Plot Details dialog.