You can review and add comments to projects you are reviewing in the Workfront View app. 

You cannot add comments to tasks or issues in Workfront View. 

To add comments to a project in Workfront View:

1. From the Home Page of Workfront View, tap a project to access it.
2. (Optional) Add the Updates widget to your view.
   For more information about adding widgets to your project view, see "Updating Widgets in the Project Details View."
3. Tap the Updates icon (bottom right) or (conditional) the [+] icon on an update in the Updates widget.
   
4. Type in an update.
5. (Optional) Include others in the update by tapping the people icon and specifying the name of another user.
   
6. Tap Post.
   The comment appears on the project, in the Updates widget.