Hello;
When i click on the button i would that if an item is checked modify this field
My BrowseGallery is a List SharePoint an my field is Status_Request
I test but without succes :
ForAll(BrowseGallery1.AllItems;If(Checkbox2.Value; BrowseGallery1.Selected.Status_Request.Value="Approuved";Notify("false")))
ForAll(BrowseGallery1.AllItems;UpdateIf('Home Working Test'; BrowseGallery1.AllItems.Checkbox2.Value=true; BrowseGallery1.AllItems.Status_Request.Value="Approuved");

Thank you for you help ! 🙂