We're using the CVAT labeling platform to perform the annotations. The CVAT tools have extensively documented the annotation process. See their tool's readme guide or their youtube video.

CVAT Tips

• Each task should only have one annotator working on it at a time. If 2 or more annotators are working on the same task, there might be problems with labels getting overwritten.

• In the CVAT tool you can use shortcuts, for instance:

  • "N" --> create a shape
  • "F" --> move to the next image
  • "D" --> move to the previous image or
  • "CTRL + S" --> save the work

Also, you can find the full shortcuts in this web page.