Demonstrate to the students how to set up the dimensions, resolution, guides and margins for the cover.
Front and back covers: 135 mm × 190 mm.
Spine width: 14 mm
Resolution: 300DPI
Set the document 284mm wide by 190mm.
Add margins & guides as shown - Explain how text should not be placed on the outside of the margin.
During the skill session demonstrate Photopea design skills.