Note: It is possible that the special fields are not in use in your Sophora installation.
The Fixed Size Text Field is helpful, when there's limited, predefined space for content, eg in Teletext pages or special displays in subways.
The MobileClient supports a simplified non-WYSIWYG version of this field. The number of characters and lines are displayed. In the background the text is hyphenated, based on the configuration of this field. The hyphenated text is not shown in the field. Please check the actual layout of the content in the preview.