A mirror line that you can draw to mirror anything drawn on one side to the other would be great!!

your standard symmetry tool

Like any other program : crita, csp, ibis paint.. A mirror tool is a must

A tool where if you draw on one side of the canvas it draws it on the other side. I've even seen some where you can split it into quarters or eighths and I think that would be really cool for patterns or designs

Have a mirror effect so that if you draw it on one side its on the other?

i just want a mirror tool