Is it possible to duplicate projection on Windows 10 while not specifiying windows on the output?

Question

Is it possible to duplicate project on Windows 10 while not including a specific window on the output/only including specific windows on the output? For example, having a word document displayed on the projector and on the main display the word document as well as a web browser window over the top that is not visible in the projection.

Alternatively, perhaps its possible to have a window that is on both the primary and secondary display when the projection mode is extend.

Answer 1

Windows itself only supports for multi-monitors the modes of Extended or Mirrored, so you will need a third-party product for that.

The product Actual Multiple Monitors ($24.95 with trial) seems to fit your requirements and enable to mirror a window or screen area to another monitor.

For a description of its usage see the article
How to Mirror any Window to a Desired Display on Dual Monitors.