These settings affect the UI for the Read Anywhere panel which is accessed through the Settings Menu.

"format": {
  "fonts": {
    "registerDeviceTitle": {"name": "Avenir-Light", "size": 16},
    "registerDeviceEmailField": {"name": "Avenir-Light", "size": 16},
    "registerDeviceInfoText": {"name": "Avenir-Light", "size": 16},
    "buttonRegister": {"name": "Avenir-Light", "size": 16}
    },
  "colors": {
    "registerDevicePanelBackground": [125, 125, 125, 1.0],
    "registerDevicePanelTitle": [125, 125, 125, 1.0],
    "registerDeviceInfoText": [125, 125, 125, 1.0],
    "registerDeviceEmailFieldText": [125, 125, 125, 1.0],
    "registerDeviceEmailFieldPlaceholderText": [125, 125, 125, 1.0],
    "registerDeviceEmailFieldBackground": [125, 125, 125, 1.0],
    "registerDeviceEmailFieldBorder": [125, 125, 125, 1.0],
    "buttonRegisterText": [125, 125, 125, 1.0],
    "buttonRegisterSelected": [125, 125, 125, 1.0],
    "buttonRegisterBackground": [125, 125, 125, 1.0],
    "buttonRegisterBorder": [125, 125, 125, 1.0]
    },
  "dimensions": {
    "registerDeviceEmailFieldHeight": 1,
    "registerDeviceEmailFieldMinimumFontSize": 1, 
    "registerDeviceEmailFieldBorderSize": 1,
    "registerDeviceEmailFieldBorderRadius": 1,
    "registerDeviceButtonHeight": 1,
    "buttonRegisterBorderSize": 1,
    "buttonRegisterBorderRadius": 1
    },
  "padding": {
    "registerDevicePanelPadding": [5, 5, 5, 5],
    "registerDevicePanelTitlePadding": [5, 5, 5, 5],
    "registerDeviceMessagePadding": [5, 5, 5, 5],
    "registerDeviceEmailFieldPadding": [5, 5, 5, 5],
    "buttonRegisterPadding": [5, 5, 5, 5]
    },
  "positions": {
    "registerDeviceTitleAlignment": [5, 5, 5, 5],
    "registerDeviceMessageTextAlignment": [5, 5, 5, 5],
    "registerDeviceEmailFieldTextAlignment": [5, 5, 5, 5]
    }
  }