Select All Checkbox
The "Select all checkbox" plugin adds an additional answer option to the Check All that Apply type of question that allows respondents to select all answers at once or clear all selections.
To apply this plugin adjust the following parameters:
*Question - Reference to a question you want to apply this plugin to. Use the Qx notation, where: x - question sequence number.
See the example of the question with the applied plugin below:
The plugin might not work correctly with the Mobile Friendly Controls plugin.