Follow the steps below to update your profile picture.
Click on the circular profile avatar in the upper-right corner, then click on the avatar again when the drop-down menu appears:
When your profile page appears, click the pencil icon near the avatar to see the following options:
View Photo
Update Photo
Delete Photo
Select Update Photo, then follow the steps to upload a new image.
Upload a photo from your desktop, documents, photos, etc.
Click Save when done.