I have a 13” MacBook - widescreen format. I have it parked with its lid closed behind a 20” Dell monitor – 4:3 format. The MacBook only drives the 20” monitor unless I am traveling. This arrangement works very well for me.
In the Displays pref panel, I have mirroring turned off since I only am using the 20” monitor. I don’t have to use the Arrangement positioning, but since I can’t disable it, I have the MacBook screen placed to the left of the 20” monitor. I’m not offered the option to NOT show the MacBook screen at all.
Here’s the problem – When I drag the cursor to the left side of the 20” monitor, it disappears off the edge because the Displays>Arrangement panel says that there is another monitor over there.
My question: How can I constrain the cursor to stay within the edges of the 20” monitor only?