adds a header menu that helps to control the column visibility
Available only in PRO Edition
//simple config
webix.ui({
    view:"datatable", 
    headermenu:true
});
 
//complex config
webix.ui({
    view:"datatable", 
    headermenu:{
        width:250, 
        autoheight:false, 
        scroll:true,
        spans:true
    }
});
The whole list of parameters that help configure the header menu can be found in the related article.