To Blank or Display Cell Borders
You can hide selected cell lines within a table.
1. Select the entire table.
2. On the Table tab, click Line Display. The TABLE LINE menu appears.
3. Select an option and then select lines on the table:
Blank—Blanks the selected line segment.
Blank All—Blanks the borders of the entire table.
Unblank—Redisplays the selected line segment in the table.
Unblank All—Redisplays all blanked lines in the table.