/marker add shops
This command will put you at the start of the process of adding a shop marker. You can still type messages in chat to players.
/marker edit <marker ID>
This command will put you at the start of the process of editing a shop marker. You will need to know the ID for a shop in order to edit it.
/marker nearby <blocks>
This command will display a list of markers in a given radius around you. If you do not enter a number it will default to a 10 block radius.
/marker remove
This command will delete a shop marker. You will need to know the ID for a shop in order to edit it. This command cannot be undone, so please double check you have entered the correct shop ID.
/marker icons
Gives you a link to the marker icon webpage.
/marker help
Displays an in-game version of all possible commands and their parameters.
/marker add. This will enter you in to the marker creation system and display a message similar to this in your chat window: