This article describes how to add checkboxes to your data extraction template, how they appear on the data extraction form, consensus form and in the csv output.
You can manage reviewers by going to your dashboard, scroll down to the bottom of your review and select <data extraction>. Your list of references in data extraction will appear. Select the reference you would like to reassign to another review, scroll down to the bottom of the screen and select <manage reviewer>. You will see a list of reviewers, locate the reviewer you would like to re-assign, use the <drop down menu>, select the new reviewer you will be given the option to <preserve extraction data> or <clear extraction data> then press <save>.