In printing terms, bleed refers to the extra space added around the edge of a design to ensure that there is no white space when it is printed and trimmed. When designing in Canva, the bleed margin is fixed at 1/8" and cannot be adjusted. To set up bleeds in Canva, follow these steps:

1. Create a new design or open an existing design in Canva.
2. From the menu above the editor, click File and then View settings.
3. Select Show print bleed. A border of broken lines will appear close to the edges of your design.
4. Resize or stretch your image element(s) to cover any white gaps around the design edges.
5. Once you are done designing your document, save it as a PDF with properly formatted bleeds.

Understanding crop marks and bleed is important for print design in Canva, as it ensures that your design looks exactly how you intended it to be when printed.