Step 1:
Once in your dashboard click on any client you wish you add a note. Or, open your candidates tab and click on any candidate you wish you add a note.
Step 2:
In their profile you are automatically opened into the "Admin" tab.
Step 3:
Click on Notes tab. Then "Add Note"
Step 4:
Enter the notes in text editor and Save, like shown in GIF image.
You can refer this video to add a note.
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