How to Let Volunteers Sign Up for More Than One Shift
Let someone take setup and a later job together in Proximatic. Their receipt shows both shifts, and signup checks that the times don't overlap.
Someone who can help with setup and stay for welcome is offering two useful commitments. Let them take both without creating a second form response for you to untangle.
Proximatic lets volunteers select multiple open shifts in one signup. Setup from 8–9 and welcome from 9–11 can go together; welcome and packing at the same time cannot. The signup checks for overlaps before reserving the places.
Open the roster and you can see the person on setup before nine and on welcome afterward. Their confirmation shows both jobs too. You can see the coverage they provide without mistaking two assignments for two different volunteers.
Give the shifts their full hours, including any handover. For jobs at different sites, allow the travel time in your plan too. People can then choose a combination that fits the actual day instead of finding out at nine that the next job is across town.