diff --git a/docs/UserGuide.md b/docs/UserGuide.md
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@@ -327,6 +327,13 @@ A **person** is a patient with several fields. The fields and their correspondin
| **Tag(s)** | `t/` | Yes | Yes | Only alphanumeric characters |
You can identify these patients uniquely by their **patient ID (PID)** for easy reference.
+The PID can be seen at the top of their information card.
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**Notes**
@@ -562,6 +569,18 @@ An **appointment** is defined by several fields. The fields and their correspond
| **Sickness** | `s/` | Yes | No | At least one alphabetic character |
| **Medicine** | `m/` | Yes | No | At least one alphabetic character |
+You can identify these appointments uniquely by their **Appointment ID (AID)** for easy reference.
+The AID can be seen at the top of their information card.
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+The number indicated beside the appointment name is the PID of the person who has the appointment.
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You can manage the appointments through different commands, which can be seen in the table below:
**Notes:**
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