Select a blank program from a user bank (top left), you’ll see 2 blank presets. Click on A (above the parameter box), click on ‘presets’ (bottom right), select an effect type (eg delay) then the algorithm (eg Digital Delay), then choose a preset from the list on the left.
OK so far?
Select B (where it says B above) and do the same for that one.
Adjust all the parameters to your liking.
Rename the prog and press ‘save’ (top right)
Simples.