Using a mac OSX and a logitech M-UAG120 mouse, how do I use the wheel button to open a link in a new tab (but not switch to it)? Can't type a key in box.

Question

In the logitech control center I've clicked on my mouse (tilt wheel mouse), clicked on 'wheel button', and in the dropdown menu selected keystroke. Under 'configure keystroke', there's a "type a key..." box, and to the right, there's a "choose any modifier" selection.
On this web page, http://www.accessfirefox.org/Firefox_Keyboard_and_Mouse_Shortcuts.html, the instruction for 'open link in new tab' is Cmd+Return Cmd+Click
On this page, https://support.mozilla.org/en-US/kb/mouse-shortcuts-perform-common-tasks, the instruction for 'open link in new tab' is command+Left-click link Middle-click link
I cannot figure out how to type these in correctly to make the function work.
Help please?
Thank you all.

Answer 1

I do not know what the standard setting is. In my Mac system preferences, when I access the Logitech Control Center, I click on "wheel button" (button 3), and get a drop down menu with the following choices:
Nothing<br />
Click<br />
Advanced Click<br />
Cruise<br />
Horizontal Scroll<br />
Keystroke<br />
Modifiers<br />
Open Application<br />
Open Document<br />
Open Folder<br />
Open Web Page<br />
Back<br />
Forward<br />
Cover Flow<br />
Display Control<br />
Eject CD<br />
End Session<br />
Expose' Dashboard & Spaces<br />
One-Touch Search<br />
Quick Look<br />
Screen Capture<br />
Sound Control<br />
Switch Application<br />
Zoom
I'm lost here. The mouse used to do it, then I needed to unplug it, and when I set it up again, the wheel button is inert when used on a link.