Create a Gradient of "one Color"

Bruno Eustáquio Moreira shared this problem 1 year ago

I need to create a shaded area in an image.

I'm trying to create a rectangle with a gradient of a single color (black) to fit over the image, but they're not working. I mark the "one color" option, I select the black color, and click ok.

JIM creates a 2-color gradient, black and white. What I want from result is a black gradient up to full transparency.

How do I do?