PM2.5 Pollution Sensor V1.4 Update

I&put a lot of work into my PM2.5 pollution sensor since my last update, and I&now up to Version 1.4. I&migrated the schematic and circuit board layout to the new Fusion360 Electronics module, which used to be EAGLE. I 3D designed and printed an enclosure which holds the circuit board, sensor module and fan in place. I reused one of the ESP32 modules from a Version 1.3 beta testing board and it worked! Questions for the very smart people watching: 1) How can I tell Fusion360 that I want to use vias to punch down to the ground plane rather than run traces on the top of the board? 2) How can I import STEP models (or any other variation) and have them show up as opaque, looking as they would in real life rather than the translucent I&finding? Timeline: 0:00 - Introduction 0:34 - PM2.5 Pollution Sensor V1.4 Enclosure 3:00 - New Circuit Board 5:17 - Schematic in Fusion360 Electronics Module 8:03 - Circuit Board Layout 10:35 - Circuit Board 3D View 12:05 - Enclosure 3D Design 12:48 - Final Assembly Model 16:29 - Clothes Iron ESP32 Module Removal Attempt 18:02 - Hot Air ESP32 Module Removal Attempt 18:39 - Soldering with Stencil and Parts 19:21 - Power Up 20:03 - Add Fan 20:32 - Add PM2.5 Sensor 21:12 - Web Page 22:00 - Cleaning the Sensor 22:39 - Final Assembly and Test