I'm new to QGIS and want to create a parallel line. I'm using the CadTools plugin to do so. When I add a parallel line, the fixed length is in degrees not meters. How do I change this so that the fixed length is in meters and not degrees.
In order to change the units, you'll need to be working in a coordinate reference system that is in meters.
You can do this using on the fly reprojection to one of your local coordinate systems that uses meters.