Not sure the dpi settings ability of your printer. Canvas size also has to consider dpi. If you know these details please share. Let's assume that your fabric printer is able to print at 200dpi. Then, for a 14.5X16.5 area, the pixel resolution will be 2900pxX3300px. There, set the working canvas to the appropriate dimensions and dpi settings when you create your new image (expand the Advance Options to set the dpi (pixels/inch). Once you have the appropriate canvas/dpi settings, then place your text and objects where needed.
