How to add printable gridlines to an imported text table in a DOC

Hello all,

I forgot how to do the following:

I copied & pasted a table from the I-net into a LO document, it pasted into the document as a table.
It has separating lines for each cell of the table when just viewing the document, but the lines do NOT show up in preview mode nor do they print.

How do I add them to the entire table for printing?

I have played around for over 2 1/2 hrs and I still can not get it to work.

Help most graciously and humbly accepted.

Tnx a bunch!

Sincerely,
Sue