Here Are Some Steps for You:
a. Click the “Resize” under the design canvas.
b. Choose the size you need or click the “Custom Size”.
c. Click Resize to apply to the current design or Copy & Resize to apply to a new design.
d. Adjust the new design.
e. Just like the GIF, Resize means that adjust the size of the current design directly. Copy & Resize means that a new design window with adjusted size will be created without changing the current design size.
If you have any questions, please contact us: firstname.lastname@example.org.