pde Identify cell number

Hi,

I think it has been asked before but I didn't find the answer I need.

I was able to create a pde model with cell numbers corresponding to the right geometry by luck. See below

The model was imported from a stl file (attached) with the code below.

% Import the geometry

thermalmodel = createpde('thermal','steadystate');

importGeometry(thermalmodel,'PCBA_Dummy_PRT_2.stl');

pdegplot(thermalmodel, 'FaceAlpha',0.5)

% Mesh the Geometry and Determine the Part size

generateMesh(thermalmodel,'Hmax',.09);

thermalmodel.Mesh

% Show cell

pdegplot(thermalmodel,'FaceAlpha',0.25,'CellLabel','on')

title('Geometry with Cell Labels')

% Show face

pdegplot(thermalmodel,'FaceAlpha',0.25,'CellLabel','on')

title('Geometry with Cell Labels')

But is there a way I can identify the cell number without having it show in a plot. For example, I want to identify C1 as -0.4<Z<-0.2 and C2 as -0.2<Z<0.

Thanks,

Derek