thumbnail-builder.md
layout: default title: Thumbnail Builder parent: Tools grand_parent: ArcGIS Online nav_order: 1
ArcGIS Online Thumbnail Builder
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Building great thumbnails is a critical step to making your ArcGIS Online content more transparent and approachable. You want your users to be able to understand important information about an item before clicking on it.
You can start creating a thumbnail from scratch, or choose an existing template from the gallery.