There's probably a wallet address you withdraw to frequently so you want it saved somewhere. This article will help you know how to do this.

How do I add a wallet address to my address management? 
A: Please follow the steps below:

Step 1: Click “wallets” at the bottom right-hand side of the home page.

Step 2: Click “crypto” and select the coin for the wallet address you want to whitelist

Step 3: Click “withdraw” and ensure the network of the wallet address you want to whitelist is selected
Step 4: Click the icon in the picture below:

Step 5: At the bottom, click “Add Address”

Step 6: Input the address (ensure it’s the right address and network you have previously selected), and include a note where it says “Memo.”
If the wallet address requires memo/tag, there is a separate box to fill this as seen in the picture below:

Step 7: Toggle on the option that says “trust this address”
Step 8: Click on “send” so that a verification code can be sent to either your phone number or email, then input your 2FA code
Step 9: At the bottom, click on “confirm” and that’s it

N.B. You can add more than one wallet address to your “address management”