The size of the image in relation to the resolution is decisive for the image quality and the required storage capacity. The higher the resolution (e.g. 300 dpi) the better the image quality and the higher the required storage capacity. The Info field shows you the current size of the image in points and the size of the file in kB.

1. Go to Image optimisation and enter the resolution you want. The default values for photo print (300dpi), standard print (150dpi) and screen (96dpi) can be overwritten.
2.  Crop the image to fit,  Rotate or  Mirror as needed.
3. Select  Retain resolution to keep the original resolution when resizing. Reducing the size improves the image quality.
4. The option  Retain proportions is enabled by default. Disable it to change the length and width ratio of the original.
5. Adjust Width and Height of the image in cm.
6. Reverse changes step by step by clicking  Undo.
7.  Apply the changes.