I have received an excel workbook (many sheets). Obviously the person who created the worksheets is very versed in Excel.
Please see the picture included. This pic snippet came from the extreme left edge of the sheet. You see the row numbers to the right of the picture.
On top I see 1,2,3 and below that of course you see the sliders.
I can do what this person does with vba. The controls hide rows and columns.
My question : What is this? I can't find vba code. I dug around the sheet looking for some sort of addon that could produce this?
Thank you for your help.