Thanks David. That is what I need to do. I tried it before and it didn't work, but I went back and it did this time after more playing around with it.
I came across another problem though. Somehow I got it to work the first time, but now the problem came back. I came across the answer by accident, so I don't know what I did.
What I have is a curtain wall made by the Curtain Wall tool which is on a 90 degree angle. I want to remove the corner mullion so that I have no post at the corner of the 90 degree curtain wall bend. The problem with turning the frame to invisible is that the glass doesn't butt together. How do I get that glass to butt up to the other glass to form the correct detail for this curtain wall corner window?
I am not sure why my attachment didn't post... weird.
>ArchiCAD 23, 7000 USA FULL
>iMac, 27-inch, 2020, Processor: 3.8 GHz 8-Core Intel Core i7, Memory: 64 GB 2667 MHz DDR4, Graphics: AMD Radeon Pro 5500 XT 8 GB