Display graph of multiple variables in STM32CubeIDE with same Y-axis scale?

[SSton.1]

I am plotting the history of an input variable and it's digitally filtered output in an SWV timeline graph. I want to see the input and output on the same scale when I have zoomed in but the autoscaling works independently on each variable making it hard to visualise the filtered output.

The filtered output g_med looks 'worse' because its Y-scale is different to that of the input variable g_in. How can I view them on the same scale? (Different Y-scales highlighted in green).

Thanks.

[SSton.1]

So, does anybody know if it is possible to plot 2 variables using the same y axis? It's a pretty normal thing to need if you are looking at the input and out of a filter!