Oct 11
(un)mark all options in a checkbox list
When presented with a long list, respondents could have a way to check or uncheck all the options.
Alternatively, a kind of calculate-like conditional logic so you can check if hand-made option "Sellect all" marks/unmarks selected options. For example: either the "All" option marks the rest, or it unmarks or disables (still visible) the rest so the "All" is the only one considered.
This way, when analyzing responses, it is easier to consider only "all" and not "all"+individual checks. This requirement may vary between scenarios.
Thanks for your efforts.
Pending