Selecting and Deselecting Columns
Procedure
You select a column by single-clicking the column header.
To select more than one column:
Select a column, choose Shift or Control, and select the desired columns,
or
Choose Shift, and select the first and the last of the desired columns,
or
Select a column, keep the mouse button pressed, and pass over the desired columns.
Select a column, choose Control, and select the desired columns.
To deselect individual columns, press and hold the Ctrl button and click the relevant column header.
Result
Selected columns have an orange background.