Not all tables are created equal. Table border modes allow you to quickly modify the border style on your table.
How to adjust your table's border
To use these, create a 'Table' and select the 'Border mode' drop down from the initial table point.
Then, modify the border mode to your desired style to suit your document:
Table border modes
The options include:
All - Borders on all sides of your cells. All colours in image below
Outline - Borders on only the outside of the your table. Red in image below
Between Rows - Borders only between the rows. Green in image below
Between Columns - Borders only between the columns. Blue in image below