underline_button: default: "Underline" description: en: Enter the text for the title of the button in the composer. underline_text: default: "Text" description: en: Enter the placeholder text that appears in the composer after the user clicks the button. align_center_button: default: "Center" description: en: Enter the text for the title of the button in the composer. align_center_text: default: "Text" description: en: Enter the placeholder text that appears in the composer after the user clicks the button. align_right_button: default: "Align right" description: en: Enter the text for the title of the button in the composer. align_right_text: default: "Text" description: en: Enter the placeholder text that appears in the composer after the user clicks the button. align_justify_button: default: "Justify" description: en: Enter the text for the title of the button in the composer. align_justify_text: default: "Text" description: en: Enter the placeholder text that appears in the composer after the user clicks the button. strikethrough_button: default: "Strike-through" description: en: Enter the text for the title of the button in the composer. strikethrough_prompt: default: "Text" description: en: Enter the placeholder text that appears in the composer after the user clicks the button. Svg_icons: type: 'list' list_type: 'compact' default: 'fa-align-center|fa-align-right|fa-align-justify|fa-strikethrough|fa-underline' description: en: "Include FontAwesome 5 icon classes for each icon used in the list."