outline = [left, over, right, under]
The content of each form field is preceded by an attribute byte. Be aware that you cannot place an attribute byte in the last column of a form and expect an outline value to appear in the next column, which is beyond the form's edge. (The field does not wrap to the next line.) Similarly, you cannot place an attribute byte in the first column of a form and expect the outline value to appear in that column; the outline value can appear only in the next column.
Related concepts
Enumerations in EGL
Overview of EGL properties
Related reference
Field-presentation properties