As a stakeholder, you can convert an activity to a process. You may have created an activity and then realise that it should have been a process as there is too much detail in that one activity.
You must be an administrator or have the create process permission.
Convert an activity to a process
From the diagram content menu, select the actions icon --> Convert to Process, or
From the activity actions menu, select Convert to Process
What happens when an activity is converted to a process
The process name is the same as the activity that was converted
The process owner and process group is the same as the original process
The process author is the person who performs the conversion
All the activity tasks are converted to activities within the new process
Any attachments and notes become process level attachments and can be found under objectives
The new process is automatically linked as a process link where the original activity was