Trying to select all values returned with a DBlookup

[notesnovice]

Here is the problem, I do a DBlookup to provide a list to the user. The list is a selection of sub-categories based on the category they selected. They can then select multiple items from those sub-categories. In one case, I want the list provided to be automatically selected for them so that they don't have to check off each sub-category and/or don't think they have to choose and end up forgetting to check off all. Is there some way I can return the list already selected with checkmarks in each box or even just return the values to the field (as selected in the lookup) and move off the field so that they start from the field below it?