Making exposure properly can let your photos look in a perfect balance. Fotor’s Exposure Adjust Tool is a good and easy to do this. Here’re the steps as follows:
Step 1: Upload your photo in Fotor’s Photo Editor. 
Step 2: Under the "Adjust" menu, click “Fine Tune”. 
Step 3: Move the slider to adjust the strength of the exposure to increase or decrease exposure for your photo. Exposure is the amount of light that hits the photo-sensitive element in a camera. Exposure controls the gradations of brightness you see on your screen. Adjusting Exposure can bright or dark your photo.
Step 4: Or you can choose the "Basic Adjust" of the "Adjust" menu to change the strength of the Brightness, Contrast, Saturation and Sharpness of image. Brightness will increase the exposure on your photo, while contrast makes look brighter and darker. Saturation adds more pure colors to your photos, and Sharpness turns up clearly details rendered in your images. 
Step 5: Press the Compare button to check the photo’s change. 
Step 6: Share or export your photo by clicking the button menu.
Finally work 