You can edit your name, job title, department, manager, profile picture, and timezone by going to the User Settings Page. 

First, click on the icon or logo or your company. This should open up a drop down with 'User settings'

There are a few components of User settings, but in this case you are just interested in the User settings part. 

Here you'll be able to make any edits. 

Any changes will be autosaved!