Unwanted space in table {subject edited by moderator}

When I create a table, and insert text inside it with the "Vert" setting in "default," I am getting a lot of space between the top of the table and the beginning of my text that appears on the web but does not appear in my Dreamweaver WYSIWIG editor on my PC.  When I change the "Vert" setting to "top," I no longer see unwanted space between the top of the table and the beginning of my text, but I still get a lot of space between the bottom of my text and the bottom of my table when I look at my web page in an Internet browser.  How do I fix this?