You can adjust the shape of the contour at a node by changing the node type, adjusting the node’s control arms or changing the line segments. For example, to soften a sharp corner, change a cusp node to a symmetrical node.
From the Tools toolbar, select
the Pen tool 
.
From the Tool Options palette,
select the Edit Mode 
.
Select a node, see Selecting Nodes.
Do one of the following:
Choose Objects > Node Type and select a node type: Asymmetrical (Ctrl+Shift+S), Symmetrical (Ctrl+S), Cusp (Ctrl+U), Smooth
Right-click on the node, choose a Node Type from the context menu.
The length and direction of a nodes control arms determines the shape of the contour at the node. The arrow control handle indicates the direction of the contour.
To adjust a curve using control arms:
Select a node to display its control arms, see Selecting Nodes. Note: Cusp nodes may have no control arms.
Move the cursor over a control handle until the cursor changes to two rotating arrows, and then click and drag the handle. Note: To constrain the control arms to fixed angles (45 degree increments), press and hold Shift as you drag.
Instead of changing node types, you can simply tell Paint Shop Pro what type of line segment you want on each side of the node. You can also convert line segments from curved to straight. The line segment type and node type work together. For example, when you add a straight line before or after a symmetrical curve, the node type changes to asymmetrical.
To change the line segment before or after a node:
Select a node, see Selecting Nodes.
Do one of the following:
Choose Objects > Node Type and select an option:
To straighten the segment before and after a node, choose Convert to Line. (Ctrl+L).
To straighten the segment before or after a node, choose Line Before (Ctrl+B) or Line After (Ctrl+F).
To curve the segment before or after a node, choose Curve Before (Ctrl+1) or Curve After (Ctrl+2).
Right-click the node and choose a Node Type from the context menu.
Make a selection. Note: You can also access these commands by choosing Objects > Node Type.
To straighten a curve between two nodes:
Select two consecutive nodes, see Selecting Nodes.
Right-click one node and choose Node Type >Convert to Line from the context menu.
Adding or Removing Nodes on a Contour
Drawing Lines and Custom Shapes