How to switch between linear/log in 2D plot?

Hi everyone,
this seems like a silly question, but I cannot find an option to switch the unit (not the scale) between dB and native unit on the y-axis for 2D plot. The unit is predefined according to what quantity is plotted. For example, the voltage reading from sensor is plotted in native unit (Volts), while the total current is in dB of a reference value (see screenshots). Is there a way to change this to Ampere?

For future reference: Okay I just found out that the unit for the y-axis must be set in the "Properties" window of the plot.