The following requirement must be fulfilled:
The desired photos are available in the Photo library.
To edit and enhance photos, proceed as follows: 
1.
Click the Photos library entry in the navigation tree on the left.
à
The photo browsing screen is displayed in the stack view. 
2.
Double-click the stack that contains a photo you want to edit.
à
The detailed browsing view is displayed with focus on the first item. All other items of the selected stack are listed below, a scrollbar on the right screen margin enables you to scroll the detailed browsing view. If you place your mouse pointer on an item, a preview is shown. It will fade out when you move the mouse pointer away. 
3.
Select the item you want to edit.
4.
Click the Edit button on the lower taskbar.
à
The Editing Photos screen is displayed. A preview of the preselected item is displayed in the content area.
5.
Click the Auto Enhance button on the lower taskbar. 
à
The quality of the selected photo is automatically improved, based on terms of reference.
6.
If you want to additionally adjust a photo by means of cropping or adding effects, choose the respective editing option from the lower taskbar.
7.
Click the back button in the upper left of the screen to return to the previous screen.
à
All changes are automatically saved to your photo.
è
You have edited and enhanced a photo.
See also
Removing Red Eyes
Adding Effects to Photos
Cropping a Photo
Photo Editing

General Editing of Photos