User`s guide

Controller Design Using the Root Locus Design GUI
8-23
To increase the gain to about 33 using your mouse:
1 Hold your mouse button down as you click on any of the red squares.
2 Drag the square in the direction of increasing gain, without allowing any of
the closed-loop poles to enter the right half of the complex plane. If, when
you s tart to move the red square, you see t he gain value in the
Gain box
decreasing, drag it in the opposite direction.
3 Release the mouse button when the gain is near 3 3.
Your GUI looks like this.