Good presenters, but keys preassigned for PowerPoint (Right = Page Down, Left = PageUp). However, I want the Presenter use for slideshows, eg with Picasa. This is, however, my cursor left / right control for forward / reverse. So what to do? Presenter back? Googling for "Picasa" and "Presenter" did, however, Remedy. Using the AutoHotkey program can change the keys. This works very well and can be flexibly adapted to all programs. This functionality I would have naturally desired by Logitech, so a star deduction.