Some students today, at my five-day “Demystifying Digital Flash” workshop at Niagara School of Imaging:

Here an example of a simple one on-camera flash high key portrait: one flash on the camera aimed behind the photographer. And flash exposure compensation +2 stops.

Here is another student:

Now I convert it in Lightroom to Black and White using the BW setting.

But wait. I wanted high-key? Then in Lightroom I can change the weighting of the shirt’s sea-green colour up by a few stops:

I do that as follows: I select the BW dropper, put it in the shirt area, and drag UP:

Here is the finished shot:

Powerful and simple: high key even if the subject was not wearing a white shirt. We made it white!