All polls can be triggered manually using Javascript. That includes also the ones that have some other triggering rule selected.
To turn off all other triggers such as time and scroll and keep only the manual option, you need to choose “Manual triggering only” in poll behavior section.
To trigger a poll, just use this function:
window._rd_queue = window._rd_queue || []; window._rd_queue.push(['trigger_poll', POLL_ID]);
where POLL_ID is your actual poll ID.
Multiple Polls
In general, you can’t run multiple polls at the same time.
When you manually trigger a poll on a page that already has a poll present, it will remove the old one and display the one you triggered manually.