The fixed-size text box is helpful when space for content is limited and predefined, such as in Teletext pages or special displays in subways.
Sophora Web supports a simplified non-WYSIWYG version of this field. The number of characters and lines are displayed. In the background, Sophora hyphenates the text, based on the field's configuration. The hyphenated text is not shown in the field. Check the actual layout of the content in the preview.
Note: It is possible that the fixed size text fields is not in use in your Sophora installation. Teletext-specific features are not supported. All existing Teletext characters will be removed.