Yet another option (not exactly using JOSM) - key value pairs. Save required tags and their values in a text file as follows: post_box:type=pillar royal_cypher=VR tag3=value3 When you want to apply one of these tags, copy them and paste into the POI using the shortcut ctrl+shift+v

Yet another option - key value pairs. Save required tags and their values in a text file as follows: post_box:type=pillar royal_cypher=VR tag3=value3 When you want to apply one of these tags, copy them and paste into the POI using the shortcut ctrl+shift+v