Real Mathcad (version 15 and below) gave you the choice of paper size depending on the printer (drivers) installed but Prime seems to limit you to just six predefined paper sizes. Thats quite silly but I see no way to set a custom size or use the size the actual output device would support.
Real Mathcad also gave you the choice to either print just the first page width (like Prime does) or to also print the "pages" further to the right (it was in no way an optimal output but at least we could print the full document). In Prime everything outside the paper width can't be printed at all.
But this is just another example of Primes inferiority as its well known that Prime is in many (most) ways not at all an improvement over the old real Mathcad but a (or many) step(s) backward 😞
