Not familiar with autocad, but it seems like what you are describing is close to how the "canvas" widget works, which is a drawing-area that can be moved like a windget.
https://beyondloom.com/decker/decker.html#canvases
If you have an image in the clipboard, you can make a new canvas based on it by using Edit → Paste as new Canvas. This makes it easy to create “paper cutouts” that conceal part of a card and are hidden or revealed by scripts. You can likewise copy the image from a selected canvas to the clipboard to manipulate elsewhere with the drawing tools.
If what you are looking for is closer to an "icon font" I have one in development here, that you are welcome to wish aditional icons for.