To change the menu details, please go to Appearance >> Customize >> click on the pencil icon being displayed beside the menu.
Once you click on the Pencil, you can view menu related details in the left navigation panel and you can set the menu and edit the menu details from that section.
It seems that you have not created a primary menu for your website.
Go to Appearance >> Menus and create a menu.
After creating a menu, add the menu items you would like to show on the header
and after adding items, please select the ‘Primary’ option in the Menu Setting and save the changes so a pencil icon will be displayed as mentioned in the above reply and you will be able to customize it
Hope this helps!
Have a great day ahead!
Thanks and Regards,
Team ProDesigns
This reply was modified 4 years, 3 months ago by nirav.