You need to have created a project or have been added to a project. Both the project creator (the person in charge) and the members in the project can use this function to change the alias in the project.
[Step 1]
Click "Project" --> Select Project --> "Project Details" --> "More" in the upper right corner to enter the project settings page.
[Step 2]
Click the "My Alias in project" section on the project settings screen to access
[Step 3]
Enter the name on "My Alias in Project" and click "Done".
Note: The modified name will be seen by others in the project, so you can set the name in multiple projects separately.