The default is “1” but this number can be changed, based on your project needs. Most systematic reviews, for example, require each citation to be dual screened, so you would change the number to “2.” You may choose to leave it at “1” if you’re working on a personal project, or just doing some scoping. Alternatively, you can also set it to a higher number, depending on your project needs. For example, if you are in a pilot phase, and want everyone on the project to do reference screening, you may wish to select a higher number.