The first reason why you might see double square brackets in a structured reference is that the column headers they refer to contain a special character. In these cases, the extra pair of square ...

It's often useful to freeze header rows in place in Microsoft Excel to remember what type of data is in various columns as you scroll or search through a lengthy spreadsheet. You can also make sure ...

<br><br>If that's not clear, here's a screenshot of what I mean. I happen to be viewing that in Excel 2007 but they're using E2k3. This grouping/"outline" is an Excel thing.<br><br>This was generated ...