Epson PowerLite 7550C User Manual page 125

Note: If you have multiple sets of Effects button assignments, make
sure you register and name each new set. If you fail to register the
set, it disappears as soon as you recall another set.
To recall a set of button assignments, select its name from the list
box in the upper left corner of the ELP Link III main dialog box.
(You don't need to click Execute to activate the set.)
To delete a set of assignments from the list box, select its name and
click Delete.
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4 • Using ELP Link III