Don't like the display name of your account when sending messages to others? The default display name is the account name itself, but you can change it with the steps below:
Step 1: Click the "File" tab in the ribbon;
Step 2: Click "Account Settings" in the "Info" section, and select "Account Settings" from the drop-down list;
Step 3: Select the account you want to change the display name, and click "Change";
Step 4: Change the name in the box of "Your name", and click "Next";
Step 5: Click "Done" to close the window.