Available Matrix Layer Types:

top
bottom
internal
neg_plane
pos_Plane
drill
drill_thruhole
drill_blindburied
drill_nonplated
silk_top
silk_bottom
mask_top
mask_bottom
paste_top
paste_bottom
rout
mill
dielectric
netlist
components_top
components_bottom
temporary
fab_drawing
assembly_drawing
mechanical_drawing
border
score
graphic