We normally attached images in our  Autocad drawing in either of the following ways 1).drag and drop from folder to viewport  2). copy paste - copy image form folder to viewport 3). by external referencing. To some cases, we shared the file and forgot to include the images, what will happen then, when you open the drawing, the image is gone. Here's the tips 1. open first your image in any of your 2d image editor, in a normal case MS Paint 2. Press CTRL A then hit VTRL C 3. Go to your drawing, on your active viewport, press CTRL V to paste the image 4. Rescale if necessary 5. Save your file If you share your drawing even the image file is not included, the image attached to drawing can be seen and don't have issue at all