Canon IXUS 1100 HS - Manual (Page 161)

Changing Camera Settings
161
You can calibrate the touch panel if you are having difficulty choosing items
or buttons. Be sure to use the toggle attached to the strap to calibrate the
touch panel accurately.
z Touch [Calibration].
z Use the toggle attached to the strap to
touch
that appears on the screen
(p. 14).
z Follow the on-screen instructions and
touch the screen four times in the following
order: in the upper left, lower left, lower
right and upper right parts of the screen.
Calibrating the Touch Panel
Only use the attached toggle to perform operations. Do not use other
objects, such as pens or pencils.