Subjects field is a commonly used in Products, Cases, Sales Literature and Articles. Using this, we can organize them in a Tree structure.
Follow the below steps to Add/ Edit/ Remove subjects.
Step 1: Go to Settings -> Business Management -> Subjects
Step 2: Select the required Subject. Add/ Edit/ Remove subjects using Common Tasks Area.
In this below screen shot, I have selected Subject Products and added Product 1 and Product 2.
Step 3: Open New Case/ Articles record to see the updated Subjects.