Making a Smooth Bracket
Delete any excess nodes at the bracket, leaving only three on-curve nodes, or add an on-curve node if needed. Drag the middle node of the three horizontally in line with the third node until the first node shows as red. The red nodes indicate that an on-curve node is redundant because it is in a straight line with another on-curve node.
Press the “F” shortcut to convert the middle node to an off-curve node.
Now the Validation Toolbar shows a different error — the off-curve node is an off-curve extreme. Click the “Add on-curve extremes” button on the validation toolbar to correct this problem.
The result is a smoothly curving bracket.