How can I change extruder multiplier for last few layers using G-code

[compnaion]

Hi. I need to change my extruder multiplier for last few layers, because I am having a problem called "Gaps Between Infill and Outline" and while changing extruder multiplier solves the problem it makes the side surfaces bad. So, how can I change the extruder multiplier for last few layers using G-codes. Or rather is it even possible?

[S3D-Mitch]

This can be accomplished using the Variable Settings Wizard as described in the following link: https://www.simplify3d.com/support/arti ... f-a-model/