Creating What I Want To See With Photoshop - Step 2

In Step 1 below, there is a distracting dark
triangle in the lower right hand corner. I like
the trees reflected on the left side and wanted
more of that on the right side, instead of the dark
triangle shape.
Using the Cloning Tool. I clicked on it and placed
my cursor on the parts of the reflection on the left.
Then I clicked and released the Alt key on the
keyboard to identify the area to be cloned. Moving
my cursor to the right hand side that was dark, I
"painted in the tree reflections".