Endnotes with square brackets: "With your insertion point in the text box beside Find What:, choose the Format button and choose Style then choose Endnote Reference from the list and click OK.
Click in the text box beside Replace With: and type [^&]. Now click on the Replace All button. A message will pop up to tell you how many replacements were made. Click OK. All of your Endnote Reference numbers should now have square brackets around them."
'via Blog this'