Expression columns

You can add an expression column to the pane.
This is a great way to develop expressions without ruining your existing tags.
Unfortunately you cannot refer to an expression column.
Typing an Excel style expression like =[My Expression] in any field won’t work.

If you want a more permanent solution or refer to an expression column use a calculated field instead.

Right Click on a column and choose Add Expression Column to add an expression column to the view.

Use the Expression Editor to add expressions and fields.