When a table is available this will appear with the colour white.
When is occupied by another user this will appear with the colour red.
When the table is occupied by your user, this will appear with the colour green.
ATTENTION:
You can only modify an order from tables that are on your user, that appear with the colour green.
For tables that are with the color red, you can only see the products that are on that table by clicking and holding on the table.