White paper could be as well reflective, and drown out the lettering. If This can be the circumstance purchase a ream of coloured paper. A myriad of able to print graph paper are available on the net. I've but to locate a absolutely free hand drawing Software for it but https://yealink-meeting-board-6535689.dsiblogger.com/67168359/indicators-on-yealink-meeting-board-you-should-know