Fillet and Chamfer - Modify

Fillet

Round-up the corner
Modifies the intersection of 2 objects by  a arc with specify radius

Home tab > Modify panel > Fillet

Radius option

Current Settings: Mode = Trim, Radius = 0

Select 1st object then 2nd object

Objects trim with the sharp corner (Radius = 0)

Start the Fillet command again

Click Radius on command line

Input 20 for the radius

Select 1st and hover cursor on 2nd object to preview the result

Select the 2nd object
An arc radius 20 tangent to both lines and trim the outer portion

No Trim option

Start Fillet command

Click Trim on command line

Select No trim

Select 1st and 2nd object

An arc tangent to both lines and the outer portion not trim

Multiple

Start Fillet command

Change the Trim option back to trim

Click Multiple on command line

Continue select 1st and 2nd object on the other 3 intersections

3 arcs tangent to each 2 lines and trim the outer portion

Polyline option

Start Fillet command

Click Polyline option on command line

Hover cursor over the polyline
You can preview the fillet result

All the 4 corners fillet at once by polyline option

Zero Fillet

Start Fillet command
Press and hold <Shift> key



Current settings: Radius = 20
Select 1st line then 2nd line, but not the arc

Corner of polyline change to sharp corner

Parallel Lines

Current settings: Radius = 20
But distance between 2 lines are more than 20

Select 1st line then 2nd line

AutoCAD create an arc tangent to both lines

Non-Parallel Lines

Current Settings: Radius = 20, Sharp corner < 20

Fillet go backward

Current Settings: Radius = 10, Opening > 10

Fillet go forward

Chamfer

Cut-off the corner, or create a beveled edges at the corner

Home tab > Modify panel > Chamfer

(TRIM Mode) Current chamfer Dist1 =0, Dist2 = 0

Click Distance on command line

Specify first chamfer distance <0>, input 10

Specify second chamfer distance <10>, input 20, then press Enter

Select 1st line, then hover on 2nd line, you can preview the result
Select 2nd line

Angle option

Start the Chamfer command
Current chamfer Dist1 = 10, Dist2 = 20

Click Angle on command line

Input the chamfer length: 20

Input the chamfer angle: 15

Select the 1st line, then hover on the 2nd line to preview the result
Select 2nd line

Method option

Start Chamfer command
Current chamfer Length = 20, Angle = 15

Click mEthod on command line

Select Distance

Select 1st line then 2nd line