There are two steps to sharing your images on a news item's "more info" page:
Step 1
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The first step is to upload them under "Media" -> "Images". It is highly recommended to create a directory first, then upload the files into that directory.
Step 2
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Once the images have been uploaded under "Images", the next step is to insert them on your news item's “more info” page:
1) Go to "Media" -> “News”.
2) Click the “more info" page option next to the news item that you’re working with.
3) Then insert a new section.
4) Select "Basic - Images (Gallery)" for the section type and click "Create Section".
5) Now just create the gallery by filling in the fields and clicking "Continue".
6) Finally, select your images and enter your captions.