Linear Taper
Linearly scales the geometry along its length.
Using Linear Taper
Click the
Linear Taper button on the Deform tab.Select the points to taper and press Enter to confirm your selection.
Choose a Primary Axis and Secondary Axis in the drop-down menus on the parameter editor.
Use the Strength parameter to control the amount of tapering.

You can change the Operation of the deformation in the drop-down menu on the operation controls toolbar or the parameter editor, since twist, bend, taper, linear taper, and squash and stretch all put down the same node.
For specific parameter node help see the
Linear Taper help.
