A family of Microsoft spreadsheet software with tools for analyzing, charting, and communicating data.
Ed,
To show this using an example of class lists. Enter data first in sheet.
In A1 have Class 1, then in A2:A5 have Alice, Bob, Cathy, Dean
In A6 have Class 2, then in A7:A12 have Elouise, Frank, Gary, Harry, Isla, Jane
In A13 have Class 3, then in A14:A17 have Konrad, Lem, Marcy, Nina
Next click Data > Group and Outline > Settings, and the Settings dialogue box will appear. Make sure 'Summary rows below detail' is unchecked - in this example the Summary rows (Class 1, Class 2, Class 3) are above the detail (the class member names). Click OK.
Next select cells A2:A5 then click Data > Group and Outline > Group, and the Group dialogue box will appear. Select Rows (if not already selected) then OK. You should then see the start of the outline appearing to the left of the row numbers. Repeat this step for A7:A12 and A14:A17
You should then have boxes with 1 and 2, and 3 - signs next to Class x, and dots next to the names.
If you click on one of the - signs it will change to a + sign, and all the rows with dots belonging to that group will auto-hide. To unhide a group, click the + sign.
To auto-hide all dots in one go, click the box 1.
To auto-unhide all dots in one go, click the box 2.
Hope that example helps.
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Regards, Tom