To view how your thumbnails will look on different templates:

• login to your FASO Control Panel
• click Design icon (upper row)
• click Site Template (red button)
• select a template from the drop down list

• click on Portfolio (in the Navigation Bar of the sample)
• to apply a template to your website, click the Apply TO YOUR SITE button (upper right corner)

See this FAQ for a quick comparison of image sizes per template:
Main Page Image, Thumbnail Image & Zoom Image Sizes per Template

See this FAQ for more info on Thumbnail Layout Styles:
Thumbnail Layout ~ Masonry, Row or Slideshow

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