How to manage Gallery page?

1.How to manage title, Subtitle & Description?

From your dashboard, go to the Appearance > Customize > Page Template > Gallery Page

Here you can change title, Subtitle & Description in Gallery section.

Click on Publish.

2.How to manage Gallery Content?

From your dashboard, go to the Appearance > Customize > Page Template > Gallery Page

Here you setup content in gallery page.

Click on Publish.