Canvas offers the ability to create rubrics offline in a Microsoft Excel file and then import those rubrics into Canvas for use with SpeedGrader. It's a fairly simple process, though it does require the installation of some software to get started.
First things first: We recommend that you install all the software that you'll need.
Here's an example of what your rubric should look like in Excel:
Please note: your rubric file must be saved as a "Tab Delimited" file format.