Many Flex theme features include icons to enhance sections, blocks, and more throughout the theme.
Use the Elements portion of the Theme settings to select Outline or Solid for the Icon style setting
Browse through the shapes below (listed in alphabetical order) and note the name of the one you want to use. Then use your theme editor to enter that name to the Icon field for that element.
Outline Icon Style
Solid Icon Style
Use Icons to Enhance Theme Features
Use the Icon field to connect an icon with: