To modify the parameter EtchedFilmThickness, perform the following steps

Step Action
1 Go to Solving >> Edit Parameters … to open the Variables and Functions dialog box.
2 Double click the entry “EtchedFilmThickness” in the User Variables list to bring the information into the User Variable declaration panel.
3 Change value in Expression to a new value, 0.6
4 Click Add/Apply to update the value.

The picture in the refractive index view, as in Figure 6, will change to a film thickness of 0.6 microns, and the simulator will solve the new structure.