PdeModeler App Generic System of Equations are different from those in the Manual

I have uploaded from the PDE Toolbox manual, the kind of generic equation that can be solved using this toolbox. However, inside the pde specifications menu for a generic system, you will notice that the first time derivative term is missing. How could I solve a system that will include all the possible terms (ie truly generic)?

Answer 1

[Torsten]

https://de.mathworks.com/help/pde/ug/pde.pdemodel.specifycoefficients.html#bu7pwf5