control-click on a vnc session from a mac

Without control-(mouse) click, a lot of functionality is lost.  I have finally figured out how to geve the equivalent of it on a mac, when running a vncviewer window on the mac.

On the mac, go to apple>>system preferences>>Trackpad>>Secondary click.

Under the Trackpad pane;’s “Secondary Click” are:
–A check box –   check it.
–A pulldown menu under “Secondary Click” where you can choose what action will represent the control-click. I chose “click in bottom left corner.”

And indeed, when I click trackpad in lower left corner on a VNCviewer session, the vnc session responds as if I had hit control-click.