Are you talking about an actual slicer feature, or the ability to enable it?
I simply have the gcode command in my start script.

Make sure you're barking up the right tree. Is the glass warped, or is the gantry sagging? On my old Makergear M2, the plate with the linear rail for the X axis would take on a little warp. Some said it was a reaction to the belt tension - I never confirmed the true cause. I removed the linear rail ...

On the Advanced tab, make sure "Only retract when crossing open spaces" is not checked.

I tried to force this to happen with process settings, but couldn't make it happen.
If start/end print height is outside the model S3D throws an error when slicing. I tried having no models selected in the process but it would bring the models back into the process if there wasn't anything to print.

I've used multiple processes on the skinny bits of a print like that to control speed, temperature, and cooling. Takes a fair bit of trial and error to get into something like that. I've added a part to the print for cooling purposes, similar to what you are describing.

I haven't used Gizmodorks nylon - I've only had one spool of Gizmodorks material - it was black PC and never was able to get a decent print from it. So my limited experience with Gizmodorks would lead me to avoid their material. I've had plenty of beautiful prints from eSun PC. My nylon prints have ...

Change your extrusion width to get the print characteristics you want.

When I saw your photo, I thought you had a super thin web that was breaking off, but this part has some mass to it. it should be a good, strong part in PETG. Can you share your factory file so I can see all your print parameters. The build on top of the support looks VERY loose, so I'm inclined to t...

Is that part broken, or intact? What does the bottom do? How is the part loaded that's causing the failure? Black is hard to photography - just attaching the STL file might be just as helpful. I'm wondering if your print orientation is the best choice. Can you print it as you show it lying on the ta...

Not all PETG materials are created equal. Who's PETG are you running? Temperatures also matter a lot. Different brands of PETG achieve optimal strength at different temperatures. I've had good luck with eSun, Hatchbox, and MG Chemical filaments. Hatchbox is my favorite PETG, but they have supply cha...