For example, in this shot above of the Thumbuakar Performers at the Night Safari in Singapore, the performer was slightly on the dark side. So by duplicating the background layer (shortcut: CMD + J), hover the mouse over to the Blend Mode, where it says Normal. Click on it, and a drop down list appears, now select Screen.
The Screen blending mode is one easy way to brighten your image!
1. If the image is too bright, adjust the opacity of the layer. 100% would be brightest, while 0% has no effect.
2. In this case, the fire became too bright, so I would add a layer mask by clicking on the Mask icon, and paint over the flame area with a black brush with 100% opacity.
Hope this tip brightens your day and helps you with your workflow!