You may choose to create filters on your analysis to exclude elements or define your own perimeters. You can switch between the "AND" and "OR" operators by clicking on them.
Using an "AND" operator will allow you to add strict conditions; only elements that fulfill each condition will be taken into account.
Using an "OR" operator will allow you to include in your perimeter elements that have been part of each condition at least once.
NB: as mentioned in this article of our Knowledge Base, using an "AND" operator is mainly recommended when you need to apply a complex exclusion to your analysis.