This post demonstrates the Minimal Mistakes gallery include helper.

5 images will auto-layout as third (3-column grid):

Mountain landscape Forest path Ocean waves Desert dunes City skyline
A collection of placeholder images from Picsum — click any image to view full-size.

Using layout="half" overrides the auto-detection to 2 columns:

Mountain landscape Forest path Ocean waves Desert dunes City skyline
Same gallery, but in a 2-column layout with layout='half'.

The gallery helper is great for image sets — portfolios, travel diaries, product shots, and more.