Once an image is no longer required in the drawing, you can detach it from the drawing. Detaching an image removes it from the drawing, and from the Image Management dialog box.
If you want to remove the image from your drawing, but you want it to remain accessible without having to find it again, use the Delete command, just as you would delete other entities. The file is deleted from the drawing, but is kept in the Image Management dialog box.
How do I...
Change the path for raster images
Unload and reload raster images