Hey @Hicham
you can set the default property of your checkboxes to the "check all" checkbox value. In this example checkbox2 is the "check all" checkbox:
Default property "Option 1": checkbox2.value
Default property "Option 2": checkbox2.value
Default property "Option 3": checkbox2.value
Hope this will help!
Best regards
Marvin
If you like this post, give a Thumbs up. If it solved your request, Mark it as a Solution to enable other users to find it.
