just choose a color, dont worry ill add more like tommorow, and when using the eraser to change the size of the eraser you just do it like you would with the normal colors by the way to change the size just use the up and down arrows (the up arrows are bigger size and the down arrow is smaller) and with quick size you just type in a number and it sets your size to that but the sizes are realy big so i wouldnt go over like 10 or something