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