crop to fill screen option

[axu2]

or adjustable fixed sized crop

[Silver0006]

Is this different from intermediate stretching?

Is the idea to cut off anything that doesn't fit within the given size? If so how would this be done? With numbers, percentages or visually?

[axu2]

Is the idea to cut off anything that doesn't fit within the given size?

Yes

If so how would this be done?

ImageOps.fit

However, I'm not totally sure this feature is worth doing.