Update UserGuide.md

docs/UserGuide.md

@@ -37,6 +37,20 @@ java -jar tp.jar
 
 ## Features
 
+### List Expenses: `list expenses`
+Run the command followed by choosing what to sort the expenses by
+#### Sort the listed expenses:
+* By Date Added
+* By Name
+* By Price
+---
+### `set currency` / `get currency`
+Set/get the currency used by the app
+#### Usage:
+```
+set currency {USD/MYR/CAD etc.}
+```
+---
 ### Delete Expense: `delete expense`
 Deletes an expense from the current list of expenses.
 
@@ -79,4 +93,4 @@ Spent $150.0 on book in the Others category on 2023-02-01
 * List future expenses `list future expenses`
 * Check upcoming expenses `check upcoming expenses`
 * Pay future expense `pay EXPENSE_ID`
-* Exit application `bye`
+* Exit application `bye`