Release 10.1A: OpenEdge Development:
Progress 4GL Handbook

Resizing the browse column

To let the user resize a browse column, use one of the following techniques:

To let the user resize any column of a browse, you set the browse's COLUMN-RESIZABLE attribute to TRUE.
To let the user resize a single column of a browse, you set the column's RESIZABLE attribute to TRUE.
To resize a column through direct manipulation, the user drags a column separator horizontally.
To resize a column programmatically, you set the column's WIDTH-CHARS or WIDTH-PIXELS attribute.