Use Convert to Bezier Line to change the selected Point Line to a Bezier Line. The change takes place immediately.
A smoothly drawn line with the minimum of points is more likely to produce a good result.
Shortcut
Keys: Alt, H, CP, CC
Change a Point Line to a Bezier Line
Click on an object created in Point Mode.
This is an object that was created with Quick Create, Freehand Create or drawn by placing points in Point Create.
Click the Home tab.
In the Convert Points
drop-down menu in the ribbon bar, select Convert to Bezier Line. The line changes to a Bezier line immediately.
If you change your mind, use Undo rather than converting back.
The number of points in the Bezier line will depend on the number of points in the original line. Delete points and adjust the handles on the remaining points to optimize the Bezier line.
If desired, select another object and click Convert to Bezier Line again to repeat.