Hi,
To center table vertically and horizontally to the middle of page in Word, you need:
Click with right mouse button on table, to show the options and select
Table Properties
In Table Properties window, set
Text wrapping to
Around and then click on
Positioning
In Table Positioning window, set both
Horizontal and Vertical position to
Center and
Relative to Page
To have your table aligned exactly to the middle, check if there are correct values in the
Distance to surrounding text and also in Before and After spacing.