On my Pro-Ten, on the last page before printing towards the bottom of the box is an option to do "Black and White Print". I don't always check it - and if it has been checked it *must* be unchecked to print color.
Ooops - The 14x26 size I mentioned is one I use in Lightroom CC. I don't know if it is available on any other platform - I just discovered that I wasn't able to use it on (Mac's) Photos a few minutes ago. Sorry if I misled you. Tony
Sure - Check out Red River Paper (redrivercatalog.com) for some odd-sized paper. You can easily enter sizes in the "custom" dialog. I frequently print 5x7s on 12" x 12" squares using the 10x12 option. Incidentally - you can print on paper up to 14"...