Help with Line thickness

I know this probably sounds basic but I can’t figure it out. I want to save time and use the largest bit when cutting out a circle. When I bring the circle onto the canvas it wants to use a detail bit. How can I increase the circle thickness so I can cut out the design faster with a larger bit. I have the bit set at 1/8 but the simulation does not see it because it only shows what the 1/16 the will cut.

Move your circle cut to a different workpiece.