For the gallery section, you need to install and activate the Tp Gallery Images Posttype Plugin. After activation, our gallery section will appear in the dashboard.
Go to Dashboard >> Tp Gallery >>Add New.
Go to Appearance >> Customize >> Theme Settings >>Gallery
Here you can
Enable/Disable option: Here, you can select the enable/disable the option to show or hide this section.
Section Title: Allow you to enter the title for your section.
Section Sub Title: Here you can write a description of your title.
Hope this will solve your query.