CorelDRAW sees bitmaps as objects with a fill and this allows users to manipulate a bitmap with the Shape Tool (Toolbox > Shape Tool or F10). Just as you would manipulate a vector object with the Shape Tool, you can manipulate a bitmap.  Just add or remove control nodes to quickly crop or re-shape your image.  To undo the editing and return the bitmap to its original shape (rectangle), just select the whole image using the Shape tool and press Delete.

Tip provided by Richard Reilly, Graphic Designer and CorelDRAW Master.

Anonymous