If you have an album with folders and a different theme image for each folder, the first two items of the theme image context menu are Edit... and Set cropping..., see attached screenshot,

The Edit function applies to the theme image of the current folder, but the Set cropping function is globally applied to the theme images of all folders. This makes the UI inconsistent and the crop function less flexible.

So my request is:
Add an extra check-box “Use for all theme images” to the Set cropping dialog window.

To be compatible with the current functionality, the default value should be true, but if the user clears this check-mark, the setting should only be applied to the theme image of the current folder.

This makes the UI more consistent and makes it possible to show always the best part of a theme image.