Move the Pen tool pointer over point E again. When the convert-point icon appears ( ) next
to the pointer, click point E to remove the leading direction handle.
Click and release on point F to make a straight line.
As you draw with the Pen tool, you may want to edit part of a path you previously drew.
Pressing a modifier key with the Pen tool selected, you can move the pointer over a previous
path segment and drag to modify it, which is what you’ll do next.