The default theme configuration does not have that option for phone screens. However, with a little work, you can implement it:
1. Copy responsive.css from the parent theme to your child theme.
2. Find this section:
/* ------------------------------------------------------------------------- *
* Toggle Sidebar s2 : 1200px > 480px
/* ------------------------------------------------------------------------- */
@media only screen and (min-width: 480px) and (max-width: 1200px) {
3. Change the @media line to this:
@media only screen and (min-width: 0px) and (max-width: 1200px) {
4. Find this section:
/* ------------------------------------------------------------------------- *
* Toggle Sidebar s1 : 960px > 480px
/* ------------------------------------------------------------------------- */
@media only screen and (min-width: 480px) and (max-width: 960px) {
5. Change the @media line to this:
@media only screen and (min-width: 0px) and (max-width: 960px) {
6. Find this section near the bottom:
/* ------------------------------------------------------------------------- *
* Mobile (Low Res) : 479px > 0 (320px)
/* ------------------------------------------------------------------------- */
@media only screen and (max-width: 479px) {
7. Delete the entire section.
8. Add this function to your child theme functions.php file:
/* load responsive.css from child theme */
function alx_styles() {
wp_enqueue_style( 'style', get_stylesheet_uri() );
if ( ot_get_option('responsive') != 'off' ) { wp_enqueue_style( 'responsive', get_stylesheet_directory_uri().'/responsive.css' ); }
wp_enqueue_style( 'font-awesome', get_template_directory_uri().'/fonts/font-awesome.min.css' );
}
The downside to this is, if the default theme responsive.css file ever changes, you’ll need to copy the new version to your child theme and make the same changes again.