Custom Vert Scale values?

in OpenBCI_GUI
For the OpenBCI GUI is there a way to choose manual vert scale values outside of the preset selections? I would like to be able to go below 25 microvolts and would also like to be able to chose values between 25 and 50. I know these values are possible with autoscale, but I'd just like to keep the values steady.
Comments
https://github.com/OpenBCI/OpenBCI_GUI/blob/master/OpenBCI_GUI/W_TimeSeries.pde#L56
https://docs.openbci.com/Software/OpenBCISoftware/GUIDocs/#running-the-openbci-gui-from-the-processing-ide
Thank you!