Release 10.1A: OpenEdge Development:
Progress 4GL Handbook

> ## Object positioning

> To arrange objects in a frame, you must explicitly position each one by setting the appropriate vertical (`ROW` or `Y`) and horizontal (`COLUMN` or `X`) attributes. However, Progress does assume the topmost and leftmost position in the frame if you do not set a placement attribute for the object. This means that, if you place multiple dynamic objects into a frame without positioning them properly, they all wind up on top of one another.

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