Yes, it's almost like a standard, but it is optional. Some people like 16 columns. I personally use 12 but have used 16 in a project that required smaller segme

Yes, it's almost like a standard, but it is optional. Some people like 16 columns. I personally use 12 but have used 16 in a project that required smaller segments. This comes from paper design, as usual, and I don't think 12 was the number. It's just a number that makes sense for desktop screens (where it began).