Many of the most important adjustments can be applied automatically, using a machine learning algorithm trained on 20 million photos. If that also fails, you will be offered to save the layered file to a custom location.
 
 

Pixelmator vs Photoshop | Top 7 Differences to Learn.‎Pixelmator Pro on the Mac App Store

 
Other essential and useful filters adding borders, inner shadows, gradations on non-transparent parts of the layer etc. The smart alignment guides would not always appear correctly in certain situations.