Gallery

click on any of the images and then on the right you can edit the images

1. Click the image
2. check the box at the top right if the navigation page isn’t showing
3. then click the edit or adjust the settings

Here’s another type of gallery also

1. Same concept here but make sure you show the different design elements
2. then select the top level of the gallery
3. then click Add to upload pictures or click on a picture to replace them.
   You can change the settings to the right again