In WordPress Dashboard go to Appearance submenu and click on Customize.
After clicking on customize you will in theme Customizer.
Here you have to click on Frontpage Sections than Menu Item Section
In Setting you can hide and show the Menu Item Section by clicking on hide/show button.
Go to Customize -> Frontpage Sections -> Menu Item -> Setting -> Hide/Show Section.
In WordPress Dashboard go to Appearance submenu and click on Customize.
After clicking on customize you will in theme Customizer.
Here you have to click on Frontpage Sections than Menu Item Section
In Header Here you will change Title & Description.
Go to Customize -> Frontpage Sections -> Menu Item Section -> Header -> Title & Description
WordPress Dashboard go to Appearance submenu and click on Customize.
After clicking on customize you will in theme Customizer.
Here you have to click on Frontpage Sections than Menu Item Section
Go to Customize -> Frontpage Sections -> Menu Item Section -> Content
How do I Manage Title & Description Setup in Portfolio Section
You have to use Menu Image Size 80Px X 80Px