# Set 'Advanced' theme as primary theme.
# Go to {nav Catalog & Website > Browse Website}
# Select 'Content Mode'.
# Input some text into editable content block, save.
# Set 'Simple' theme as primary theme.
# Go to {nav Catalog & Website > Browse Website}
# Confirm that content block is empty.
# Go to {nav Configuration > Website > Themes}
# Select 'Simple' theme in the grid
# Press 'Copy Data From' button.
# Choose 'Advanced' theme from dropdown.
# Go to {nav Catalog & Website > Browse Website}
# Confirm that content block is filled with a text, that was entered in 'Advanced' theme.