I.R.I.S. IRISPen Executive 6 for Windows - Manual (Page 48)

IRISPen Executive 6 - User's guide
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• Modify the default programming by selecting the required radio
buttons on the left- and on the right-hand side. The left radio
buttons refer to the left button, the right radio buttons refer to the
right button.
Possible operations
Null: This corresponds to a "null" operation. In other words, a
single click will not trigger off any action.
This option is usually used to deactivate a programmed
operation.
Custom...: This allows you to program your own custom
operations, i.e.: any other keyboard command - including a
combination of commands -, or the addition of characters,
character strings, or even the combination of several operations.
To enter the custom operation, select the required radio button,