How to: Remove the table frame without deleting the table.
Solution:
Select the table and select the 'Format' menu and select 'Frame...'.
1) Place the insertion point inside the table.
2) Select the 'Table' menu and select 'Select Table'.
3) Select the 'Format' menu and select 'Frame...'.
4) Click 'Remove Frame'.
NOTE: If the document is not in 'Page Layout', a prompt will appear asking whether to put the document into page layout. Click 'Yes'.