The seventh amendment, again, is a little debated amendment.
In Suits at common law, where the value in controversy shall exceed twenty dollars, the right of trial by jury shall be preserved, and no fact tried by a jury, shall be otherwise re-examined in any Court of the United States, than according to the rules of the common law.
This is just saying that in civil suits worth more than $20, the defendant has the right to a jury trial. This doesn't mean that a jury trial is required, but people can elect to have a jury trial, rather than rely on the judge to determine whether or not the defendant must pay. That's basically this amendment in a nutshell.
We can't be forced to have just one person determine our fate in civil court. That's great news!