Trend logs - Multiple Trends scaling/positioning

[Chandrias]

When I select multiple trends in the trends log, the application adds the second trend only, in the right side, with different y-axis.
Is it possible to select which trend goes with each y-axis and also define the values of the axis (i.e. min, max value)
In my case, i have two temperature sensors, which i need to compare, so I need them both in the same y-axis.

[admin]

Both objects must have the same units.