Last night we rolled out the re-canvassing feature. When canvassing you can see what the voter's prior responses were. As this all live, if you have multiple people canvassing a neighborhood, they will be able to see what houses have been completed as well as the responses if something needs to be changed.
(If you are looking really closely, you may notice the address of 4905 look more like 4906 in the image on the left. It really is 4905, but the compressing of the image has distorted the number.)