A system customizes and generates data representing an electronic form for storage on a target workstation ready for use prior to execution time of a procedure used to generate the form. An adaptive user interface generator generates code representing an executable procedure for use in providing a user interface display including a plurality of displayed user interface display elements. A source of presentation control information determines a user interface presentation format of a display image capable of being adaptively scaled to fit different display image sizes. The presentation control information specifies relative location and size of the interface display elements. A transformation processor transforms the presentation control information into executable procedure representative code for use in providing a user interface display image with a format suitable for a desired display size. The source of presentation control information determines the user interface presentation format of the display image exclusive of data identifying absolute image display element positions in the display image.