Table.PreferredWidth Property (Word)
Returns or sets the preferred width (in points or as a percentage of the window width) for the specified table. Read/write Single .
expression An expression that represents a 'Table' object.
If the PreferredWidthType property is set to wdPreferredWidthPoints , the PreferredWidth property returns or sets the width in points. If the PreferredWidthType property is set to wdPreferredWidthPercent , the PreferredWidth property returns or sets the width as a percentage of the window width.
This example sets Microsoft Word to accept preferred widths as a percentage of window width, and then sets the preferred width of the first table in the document to 50% of the window width.
With ActiveDocument.Tables(1) .PreferredWidthType = wdPreferredWidthPercent .PreferredWidth = 50 End With