Menus may have a default command. This is a command which gets run if a menu item with no command is executed. This may not sound very useful on its own, but default commands are run through a substituion pass where the special "<LABEL>" string is replaced with the label of the menu item being executed.
To set a default command on a menu:
/sms menu mymenu defcmd "/do this default command"
To remove the default command:
/sms menu mymenu defcmd ""
To see the default command on a menu, if any, you can use
sms menu <menu-name>.
A useful example (assumes you have a plugin which provides a
/warp command, and have created named warp points warp1, warp2, warp3):
/sms create warps &1-Warp Points- /sms menu warps "/warp <LABEL>" /sms add warps warp1 /sms add warps warp2 /sms add warps warp3
Since each item has no command, only a label, the default command is run whenever an item is selected. That command is
/warp <LABEL>, which is substituted depending on which item is selected. E.g. if you select warp1, the command
/warp warp1 will be run.
Any formatting codes in the label will be stripped when using <LABEL>. E.g. if you have a menu item like:
/sms add warps &4warp4
then the item label will appear red in the view, but the string "warp4" will be substituted for <LABEL>.
If you want the label to be passed unchanged, with all formatting codes intact, then use <RAWLABEL> instead.