When you edit a component for All Denominations, the component positing/sizing tool becomes available on the work surface.

A We are editing a image component.
B To resize an component, left click the red handles with your mouse, hold down and move. Let go of the mouse when resized.
This video also shows how the "Aspect Ratio" of an image component controls how the component can be resized. When resizing an image component that has the "Aspect Ratio" set to Maintain, you can not skew the image dimensions. In this video we switch the 'Allow Skew" so we can change width and height independently.

Some components are fixed size, like components with physical items like stickers. Other component types can not be reduced smaller than a certain size, like QR codes, since they need to maintain minimum sizes for scan quality.
C To move an component, position your cursor over the component area on the work surface, left click and drag. Let go of the mouse when positioned.
You can not move a component off the work surface.