The thumb button on the MX5500 mouse enables you to switch between open and active applications quickly when the Logitech SetPoint Mouse and Keyboard Software is installed.
NOTE: Using the thumb button with Windows Vista or Windows 7 will activate the "Switch Between Windows" feature built into those operating systems.
When SetPoint is installed, the thumb button will perform the document flip function by default. If you don't have SetPoint installed, you can download the latest version from the MX5500 Downloads Page.
To quickly switch between applications and documents:
Press or roll the thumb button to activate the Document Flip window.
The Document Flip window will open and list all open and active applications and documents.
NOTE: The Document Flip window will not appear if there are no active applications open.
Push the thumb wheel up or down to select the application or document you want to switch to.
Once the application or document you want is highlighted, left-click to switch to it and display it full-screen.