I am new to the app and have started by following along with the video tutorial step-by-step. Things started easily enough with making basic layer adjustments. But now I've become hung up at the in-painting tool and trying to 'erase' unwanted subject from the background of the photo. I choose the tool and adjust the width, but when I go to select/hold to mark the area to be removed, nothing happens. I have a 2015 MacBook and have tried with the trackpad and with a wireless mouse. What could I be doing wrong?
