If this template helps then use it. If not then just delete and start from scratch.
OS (e.g. Win10): Linux PsychoPy version (e.g. 1.84.x): 2020.2.3
What are you trying to achieve?:
the Bulder automatically opens the window with UseFBO = True, MultiSample=False, and numSamples=2. I intend to run the experiment online. My experiment has a visual stimuli comprised of a rod oriented at specific angles from vertical. With the window created by Builder the rod edge looks chappy. After I compile my experiment, in Coder, I changed the useFOB=False, multiSample=True and numSamples=16 and the rod edge looks great. However I can not convert the coder code to PsychoJS. So is it any way to control the anti-aliasing from the Builder? I uploaded the project on pavlovia and the edge looks chappy there too. I thought the PXI renderer might do something different, but no.
You can insert a Code component in Builder, which allows you to inject code at certain points. If you do the same thing you did in Coder via a Code component instead, then it should be translatable to JS and run online