How can I move a child project from one project to another project
In creating a project that I thought would be a child project of another project it ended up being the parent project and the child projects moved under the new project. I have found your help to be less than helpful and frankly non existent. I have the premium edition.
You can right click on a Project, and choose "Edit Project" from there you can either press "Ctrl+RightArrow" or "Crtl+LeftArrow" to change the indent level of that project. You can also follow the same steps and then click on the arrows at the right hand side of the Project.
This will allow you to change a task from being a Parent or Sub task. On the left hand side of a project, once you hover you will see 3 dots which you can click and hold, then drag to the location you'd like.