[Fill layer doesn't show up when setting up to print]

Software is Affinity Photo trial.   Figured it out.    Right clicked the layer and selected merge visual which created a pixel layer listed below the fill layer.   Now the background is the color that I selected.

[Fill layer doesn't show up when setting up to print]

I'm doing a trial for the software and used the tutorial to create a collage.    Everything looks OK.   When I go to print the collage the background colored layer shows to be white and not the color I chose for the background.    Is this a trial software thing or am I doing something wrong?    The background layer is at the bottom below the placed pictures and text.