Here we are milling a flat on a round part. Set the axial depth of cut on the Dashboard to the highest point on the round. This will ensure stability through the entire cut.
If you are milling an inside pocket and will be making right hand turns in the corners, set the radial width of cut to a full slot or calculate the full engagement on the right and use that for your width of cut (divide full engagement in degrees by 180 and multiple by 100 for the width percentage) for the entire path to avoid chatter in the corners.