To create a fillet with a specific radius

1. Double-click the Fillet Curves icon, or choose Curve Edit > Create > Fillet Curves   from the Palette.
2. Set Construction to Circular, then click Go.
   
3. Click the first curve approximately where you want the fillet to touch the curve.
   

   If the two curves intersect, click the segment of the first curve that you want to create a fillet for. If Trim Curves is on, click the segment of the first curve that you want to keep.

4. Click the second curve approximately where you want the fillet to touch the curve.
   

   If the two curves intersect, click the segment of the second curve that you want to create a fillet for. If Trim Curves is on, click the segment of the second curve that you want to keep.

   Alias displays a preview of the fillet.

   
5. If you want a different radius from the default (displayed in the prompt line), type the new radius, or drag the mouse to change the radius interactively. Dragging the mouse left or down decreases the radius. Dragging the mouse right or up increases the radius.
   

   If the current radius is too small or too large to build a fillet near the point you clicked, the Fillet Curves tool reports an error. Type a new radius and try again.

   If you do not want to create the fillet, select Pick > Nothing.

6. Click Accept.

   Alias builds the fillet.

   When the fillet is built, the original curves are trimmed to both ends of the fillet. To keep the curves intact, turn off the Trim Curves option.

To create a fillet between two specific points on the curves

1. Double-click the Fillet curves icon, or choose Curve Edit > Create > Fillet Curves   from the Palette.
2. Set Construction to Freeform, then click Go.
   
3. Click the first curve at the point you want the fillet to begin.
   
4. Click the second curve at the point you want the fillet to end.
   
5. Curve locators appear on the two curves where you clicked.
   • Drag the locators to move the contact points of the fillet on the curves.
   • Click Go to create the fillet.
     
6. If Blend Control is on, after the fillet is created you can click the Tangent and Blend buttons in the bottom right corner of the view window to see the different types of fillet. Click Go again to finish the fillet.

Tips and notes

• If Create History is on in the options, you can edit the curves and the fillet automatically updates.