Dave and John.
Much appreciated.
Why the bloody hell Verbatim et al couldn't simply say that 'toggling' the DPI button controls the movement speed of the mouse I don't know. I will now ignore it completely and with apparent impunity!
![Yawn](images/smilies/custom/yawn.gif)
Thanks again.
![Applause](images/smilies/custom/applause.gif)
Geoff