Ally, the accessibility service within Canvas, makes it easier for students (and you!) to read on computer, tablet, or mobile device screens.
“By displaying text using color gradients that wrap from the end of one line to the beginning of the next, BeeLine facilitates visual tracking and enables the reader to focus on other aspects of reading... BeeLine can also help reduce screen fatigue...”
Find BeeLine Reader under the alternative formats button: 
(Alt text, to match the Canvas interface: “Alternative formats”)
More information about Canvas Ally.