Logitech NuLOOQ - Manual (Page 28)

4.
Under
Assignment,
select Type
Keystroke.
Click here to
learn more about
Assignment
types
.
5.
Click in the
keystroke field
and press and
hold CTRL key,
followed by "="
key. This will
display an "="
sign in keystroke
and "Control"
check box to the
right will be
checked.
Then go to twist
counterclockwise
and set that
CTRL and "-".