notes for Layouting with 2 columns in affinity publisher:
find a master page view -> guides -> set 2 columns here then add a text frame view -> studio -> text frame -> set 2 columns here too
setting up grid for A4
view -> grid and axis manager spacing 7mm divisions 1 enable Snap to grid
gradients
first add a shape then select fill tool and set gradient here
text frame with 2 columns
view -> studio -> text frame columns: 2