Strutt|Blank Sheets|LF 1/3 Octave Sheet inserts a blank low-frequency (0.8 Hz to 315 Hz) 1/3-octave band Strutt calculation sheet into the current workbook.
This function can also be accessed by right-clicking on the ply (the set of tabs at the bottom of the Excel window with the sheet names), using the Context-Sensitive Menus