The Reverse Round Fillet tool converts corners into concave curves (drag toward the inside of the corner) or it can be used to extend a straight path and adding a convex curve to replace the original corner.
The Reverse Round Fillet tool is used exclusively with anchor points that join two straight path segments, but those paths can meet at any angle and do not need to form a right angle. The direction that you drag determines the new shape of the corner.
The Xtream Path 2 panel offers three ways to control the Reverse Round Fillet tool:
Free Drag
You can drag the corner anchor point to create a convex curve at the corner. The distance dragged will be shown at the bottom of the Xtream Path 2 panel as you drag, expressed as the radius of the curve.Snapping Units
Specify an increment to which the curve will "snap" as you drag. The distance is measured as the radius of the curve.Fixed Radius
You enter a fixed distance for the radius of the curved corner. Click and drag a short distance and the curve will snap to the desired shape.TIP: If you need to make a set of matching corners, but don't know the radius to use Fixed Radius, use Free Drag to create the first corner, but hold down the Option key (Mac) or the Alt key (Windows) before releasing the mouse button. That inserts the distance you just dragged into the Fixed Radius field, enabling you to use that feature to exactly replicate your first corner.
Example: