The plot limits of the current set can be changed by providing values for the maximum and minimum x and y values to include on the axes. These values are not saved and when the current set changes return to the defaults which correspond to the maximum and minimum values of the x and y data arrays.
The 'Auto Limits' button recalculates the default values and updates the four entry boxes accordingly. It is important to note that the limits are linear and should be given as such even if log plots are required because they will be later converted automatically to log values when necessary.