Implemented by subclasses to select all selectable elements.
Original signature is '- (void)selectAll:(id)sender'
Available in Mac OS X v10.0 and later.
![](../icons/collapse_all.gif)
![](../icons/collapse_all.gif)
- sender (Id)
- Typically the object that invoked this method.
![](../icons/collapse_all.gif)
- Available in Monobjc Bridge: 10.6 (For Mac OS X 10.6 and later), 10.5 (For Mac OS X 10.5 and later)