There is an extra character §.Up/Down arrow
Allows you to sort the columns manually. Place the cursor in the column which you want to move, and two small arrow buttons will appear. Now click the Up or Down arrow button multiple times to move the column.
Alternatively, use Ctrl+PageUp/PageDown to change the order via keyboard.§
Add column
This button will add a new column at the end.
Delete selected column
Deletes the column in which the cursor is located.
The name of the "Delete selected column" button is actually "Delete active column" (same mistake in German help).