You may find it difficult to adjust the temperature, as small changes in absolute pressure, volume, and mass can cause apparently large relative changes to the temperature (as measured in degrees Celsius). This is because the 0 point on the Celsius temperature scale is shifted compared to the Kelvin scale which is part of the Ideal Gas Law:
TK = TC + 273.15.
For example a 3°C change seems like a 15% relative change when we think of a normal temperature being around 20°C, but it's actually a little over 1% on the Kelvin scale.
To ensure that the temperature is within range to be plotted, first ensure that temperature is not selected in the drop-down menu. Then, enter the temperature value manually, and adjust the other three using the controls until all of them are within range.