Now we will have to resize that stock image to fit our canvas. To resize or transform the image, activate the Transform tool by pressing Ctrl/Cmd + T on your keyboard. When the Transform tool is activated, you’ll see a box around the image, with squares around it.

Now to resize, simply move the square shown below to the edge of the canvas to stretch our image.

Now that we’re done with those, it’s time we do a quick fix for this lake. On the Layer Window, click on the Create New Fill/Adjustment layer button. See image below:

After clicking that, a contextual menu would open – click on Gradient Map.