Copy and paste project tasks into new project or subprojects
You can copy and paste project tasks in the following ways.
1. Paste the copied task(s) into the same project you copied them from
Press Ctrl+C to copy tasks in the Project Tasks view. After copying them to the clipboard, press Ctrl+V to paste them back into the same project they were copied from. This makes a copy under the same project.
2. Paste into a new project, directly under that project
After copying, select a new project in the Project Tasks tab and press Ctrl+V. The pasted tasks go into the selected project.
3. Paste into a new project and subproject
After copying, select a row of the subproject you want to paste into. The newly pasted tasks will go under that subproject.
4. Paste into every project, not using a subproject
After copying, right-click on any project and choose Paste into Project... A dialog appears that lets you paste copied tasks into any project. Choose "All Projects" from the dropdown list. When you click OK, a warning appears. That warning tells you that a large number of tasks could result from this action because you are creating a copy of the task(s) under EVERY project. It also explains that new projects may appear because tasks will be added to projects that didn't have any before.
5. Copy and paste subprojects and tasks
If you copy an entire project hierarchy that contains subprojects, and then paste into another project, you will be duplicating that entire structure. All the subprojects and tasks will be duplicated in the new project.
Also see: Video: Project Resource Allocation, Video: Project Management Features In Timesheet, Video: Cloud-based Project Management and Task Management, Video: Project Portfolio Management, Video: How To Choose a Project Management Tool, Video: 8 Dirty Secrets of Project Tracking