How do I remove background and then changing color of art?

I have a customer that want this line art in white on a red shirt. so I just need to remove the background which I was able to do but how do I change the line art to white? I i guess I cant even put an image on here. 

  • What technique are you going to use to get the print onto the T-shirt(s)?

    I believe that if you are going to print, either screen print or digitally, the parts that will be printed should probably be in color (black) in the printing file, so I'm not sure you need to change anything.

    If it is a Black and White (1-bit) image and you just want to show your customer how it would look on the T-shirt, simply select the image in Draw, left click the no fill swatch and right click the white.