How to superscript the citations?

Thank you for the instruction… i found the superscript option, but i still have the other problem… everytime i edit the output style, it keeps asking me to save it as another output style name (eg. vancouver copy.ens), and eventhough i’ve saved it as vancouver copy, the new output can’t be found after i closed the edit window. it keeps coming back to the original vancouver style (which the citation is not superscript) and all the thing i’ve edited doesn’t show up. what should i do? it’s started to be frustrating now.

thanks.