New answers tagged grouped-list
One option you may try is the following : Use selected disabled checkboxes for the mandatory items For each group of items, that at least one of them must be selected, use a hallow geometrical shape (circle, triangle, square etc). Use different colors for each shape. Place the shape next to each item accordingly Initially all items are unselected (except ...
Step wise wizard with clear segregated choices. When user moves to next step, load related choices then.
Don't show the groups, show the steps. Step 1(or 2) fill in the required things. Step 2(or 1) pick between the OR selections. Step 3, select optional items.
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