Column-Row Scan Movement

Column-Row scanning was used in the Possum scanning communication/ writing aid, the precursor to the computer-based aids of today. To select an item in the selection set, the user scans to and selects the column containing the desired item, and then scans to and selects the item in that column.

Picture of Row-Column scan 1 Picture of Row-Column scan 2

Each column of items is highlighted in turn...

...the column containing the item is selected and the items are scanned...

Picture of Row-Column scan 3

...the item is selected.

...Click here to try Column-Row scan movement

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Scan Movements Tutorial

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