BenQ EW Series User Manual page 23

Turn on the computer too, and press the 5-way
controller to select an input source. The displayed input
icons vary depending on the available video inputs of the
purchased model.
Follow the instructions in Getting the most from your
BenQ monitor on page 26 to install the monitor
software.
To extend the service life of the product, we recommend
that you use your computer's power management function.
How to assemble your monitor hardware 23