How to delete media images that are grayed out

[Nancy7]

I have a lot of media images that are grayed out because they no longer meet the pixel size required for upload.  How do I delete them from albums?  I'm trying to clean up the images so they are easier to find.

[Windy]

I have none of those when I look in my image library. Where are you seeing grayed out images? I do see grayed out image during processes which would require a larger photo (some of my images are not large enough, or are. not of the right file type, to be cover photos, for example. 

[Nancy7]

I do see grayed out image during processes which would require a larger photo (some of my images are not large enough, or are. not of the right file type, to be cover photos, for example. 

Exactly --

These images were acceptable a few years ago -- now they are grayed out and unacceptable.  If I can't use them, I need to delete them.  I can't find a way to do so.

[Mariholly]

I hope I explain it well: You have to be in your image folder. Select the ones you want to delete and at the bottom the button delete selected appears. But it only shows up if you have an image selected.