SiteOrigin Cell Flex Feature The SiteOrigin Cell Flex feature provides more options for the layout of widgets within their cells. The widgets are laid out using flex and can be set to layout on the vertical and horizontal axis. Horizontal Flex Aligning widgets horizontally within their cell is handled by a cell's Flex Horizontal option. Flex options are found under a cell's Layout Menu. Left Right Center Between Around Echelon Prime Subscribe to Echelon Prime to unlock full functionality. More Info. PRIME PERSONAL Get Prime for a single developer. Suitable for individuals, site owners and freelancers. PRIME TEAM Get Prime for two or more developers. Suitable for agencies, teams and companies.