Have you ever worried about shooting a poor exposure picture because of your poor technique? A poor exposure picture is a failure. But, with musemage, this kind of picture can be rebirth to an awesome one. In this tutorial, I’ll introduce one way to solve it. In the next tutorial, I’ll bring you another simpler way.
This is the original picture:
And the following is the effect picture used by levels:
Really beautiful lotus! Now, here we go.
First, open a picture.
Next, copy it and change the blending of the copied one to Screen.
Then, choose “Adjust > Levels”.
Set the parameters of Levels. 
Now, we’re finished. Quite easy?