Creating a Child Instance for a Project
 

One can easily create a child instance using "edit/outlining/add child" on OF Desktop version. How does one do the same on the iPhone version of OF?

Do you mean adding a project to a folder? (you can create a folder using the + button from the project list) Edit/Outling/Add Child should be disabled when you have a project selected because you can't nest a project inside another project.

Or are you referring to action groups in a project? Action groups can not currently be created on the iPhone, only on the Mac which can then be synced over. Please send an email to [email]omnifocus-iphone@omnigroup.com[/email] if you would like to official cast your vote for this feature. Thanks!