Managing display of a collection in Runway Admin

I'm building a collection in Runway. Each entry (an organisation) in the collection has a number of checkboxes. I have a long description for each checkbox to make it clear (to the site administrators) which boxes to check for each entry.

<perch:content id="children" type="checkbox" label="Children, Young People and Families" value="yes" suppress="true" />
<perch:content id="health" type="checkbox" label="Health and Social Care, Mental Health and Disability" value="yes" suppress="true" />
<perch:content id="olderpeople" type="checkbox" label="Older People" value="yes" suppress="true" />
<perch:content id="environment" type="checkbox" label="Environment and Conservation" value="yes" suppress="true" />
<perch:content id="sport" type="checkbox" label="Sport, Recreation and Culture" value="yes" suppress="true" />

This works fine at the item detail level in Admin. But when the entire collection is displayed in Admin (that's one level up), those long labels make a mess of the layout. Is there a way of getting short labels at the top of the columns for the collection display?

Alternatively, is there a way of getting some 'help lines' displayed at the top of the collection display? <perch:help> only displays help lines on the item detail pages.

Thanks, Graham