HM3 will not list all available popups as an option to use on any/every HUD like HM2 did. You have to open the HUD - HUD Editor and choose the 'Profile:' that has the popups you want to use on another HUD then click the 'Popup Groups' in the upper right corner. Choose the popup you want to export from the 'Group' list window on the left then click the 'disk' icon/button to the right of the 'Delete' button and export the popup/group. Then you change the 'Profile:' and repeat the process to import that popup/group to the other profile -
https://www.dropbox.com/s/zkbzh9f1xq...mport.mp4?dl=0