The created flange surface can be modified as follows using the manipulators:

Moving the drag manipulator on the guide, you can add additional manipulators allowing to specify individual lengths and angles:

Note:
Pressing the control key allows simultaneous manipulations of length and angle. In this case, however, individual values will be equated.
- Invert direction
- Upon the selected guide curve a moving frame type manipulator is displayed. By selecting either the X (yellow) or Y (blue) manipulator, you can select which quadrant of the created flange is required.
Click right at the manipulator handles to activate contextual commands:
- Edit
- Modifies the parameter value in the dialog box Tuner.
- Keep this point
- Creates a point at the current position of the manipulator.
- Spread all
- Assigns the current value to all other manipulators.
- Delete
- Deletes the manipulator.