 Most daisy wheel printers supported a relatively coarse and extremely slow graphics mode by printing the image entirely out of dots (formed by the "period" character).This required a mechanism capable of pixel by pixel movement, both horizontally and vertically, and low-end printers were incapable of it.Given the slow speed and the coarse resolution this was not a feasible technique for printing large images, but could usefully print a small logo onto a letterhead and then the following letter, all in a single unattended print run without changing the print element.