You can get to the copy function from the historical job in view mode via a dedicated button. 

Copy to: Scroll to or search for the asset to which you want to copy the historical job. 

Register: Work orders or History, i.e. check off whether it should be copied to planned job or to historical job. 

Date: Choose to take the date from the job or check off/select data from calendar. 

Check off to show whether Date, Articles, Assigned personnel, Sub-activities, Documents or Pictures should be copied from the job.