Photo Gallery

In the gallery pages you can see there are photos showing as a gallery. You can select or change the pictures from the photo gallery tab on your WordPress dashboard. Under the photo gallery tab you will find the following items

Gallery Items: Here, you will see all the previously created galleries. You can edit or delete them from here. Click on upload a new image to upload the images or select images from the library to choose from the previously uploaded images. Also, you can delete or edit the uploaded image by simply hovering over the images. After that, click Publish to publish the gallery.
Add New: Create a new gallery by clicking Add New. Click on upload new images to upload the images or select images from the library to choose from the previously uploaded images. After that, just publish to create the gallery.
Documentation: If you want to learn in detail about how to use this Photo Gallery, then read the documentation.