A system provides a single-click expandable data control implemented in a user interface development language as a data entry and viewing element including options enabling or restricting data entry and specifying a related dialog for entry or selection of data for a primary display field. A system provides a single-click expandable data element in HTML, for example, as a data entry and viewing element that is used within a user interface interactive page to allow a single line-height data display using a single mouse click to expand or collapse data, thereby providing a simple means for a user to view or enter larger amounts of data than typically fit within the limited screen space. A user interface system adaptively presents information to a user. The system includes a display processor for initiating generation of data representing an image. The image includes, an image element box comprising a text data presentation row automatically expandable into multiple text data presentation rows in response to user selection of the image element box. An executable procedure associated with the image element box determines whether text in the multiple text data presentation rows is at least one of, (a) delete only, (b) read-only and (c) readable and writable. The executable procedure is in a user interface compatible code language (e.g., HTML, SGML, XML, Visual Basic) and execution of the executable procedure is initiated in response to user selection of the image element box.