creating wallpaper with black edges on the sides

[OmlineEditor]

Checklist

• [X] I made sure that there are no existing issues - open or closed - to which I could contribute my information.
• [X] I made sure that there are no existing discussions - open or closed - to which I could contribute my information.
• [X] I have read the FAQs inside the app (Menu -> About -> FAQs) and my problem isn't listed.
• [X] I have taken the time to fill in all the required details. I understand that the bug report will be dismissed otherwise.
• [X] This issue contains only one feature request.
• [X] I have read and understood the contribution guidelines.
• [ ] I optionally donated to support the Fossify mission.

Feature description

When creating a picture for wallpaper on the screen, you can only create it within the picture itself. You cannot go beyond the boundaries and edges of the picture. please add the ability to go beyond the boundaries of the picture, and make the edges that go beyond the limits black.

Why do you want this feature?

There are pictures that do not fit on the screen with standard cropping. I want to see the picture as I see fit, but to do this I need to go beyond the boundaries of the picture.

Additional information

here is an example of the changes