A popup box will open. Select "Add a Photo," and follow the instructions on the screen until you have added all of the photos you would like included. You can choose to either upload new photos, or select from existing photos on the wiki.
Set the captions, titles, or descriptions of your selected photos. This information will display below them and will help your readers know what they're about.
Set the size, orientation, borders, or other settings available for your final creation. These options may vary based on the tool you are using.
Click "Finish". Your photos will appear after you publish the page.
Note: Videos can also be used in galleries and sliders, though they can only be added via wikitext.
Examples
Here are some of ways these great features can look on your wiki: