// https://toolset.com/forums/topic/hiding-options-in-the-post-form-content-field/
// hide advanced form buttons from non-admins
function remove_toolset_buttons(){
    global $current_user, $wp_roles;
    $admin = 'administrator'; // roles that can see the buttons
 
    // get non-administrator role slugs
    if ( ! isset( $wp_roles ) )
        $wp_roles = new WP_Roles();
    $all_roles = $wp_roles->get_names();
    $editable_roles = apply_filters('editable_roles', $all_roles);
    $editable_role_names = array();
    foreach($editable_roles as $role=>$details) {
        $editable_role_names[]= $role;
    }
    // remove f&v, forms, conditional output buttons
    if ( !in_array( $admin, $current_user->roles ) ) {
        add_filter( 'toolset_editor_add_form_buttons', '__return_false' );
        add_filter( 'toolset_cred_button_before_print', '__return_false' );
    }
 
    // remove the Access button
    add_filter( 'toolset_editor_add_access_button', function() use ($editable_role_names){
        return $editable_role_names;
    });
}
add_action( 'init', 'remove_toolset_buttons' );