Important note: The FooGallery you wish to add mush have already exist. Follow this procedure first if you are adding new photos to the site
Add a new block to the page with the “+” icon
See the procedure for “Adding a new block and block type” for more details.
Select the “FooGallery” block type. Do not select the generic “Gallery” block type.
Click “Select Gallery”
Search or click on the gallery you want to insert and then click “Insert Gallery”
The photos will now appear in the page editor. Repeat the steps above to add additional galleries to the same page. Remember to his the blue “Publish” or “Update” button when done in the upper right.