I am using the following formula in a column of cells:
`=if(XXnn="";"";timevalue(now()))`(nn according to the row XX to the column).
This enters the time correctly as a value is entered in the relevant cell.
However, when entering a value in any other cell in the sheet, the time value already entered is then also changed to the timevalue(now()).
I see from this resource that the (NOW) function is volatile but does anyone have a work around to suggest?
How can one use this formula so that it is persistent and doesn't change when another cell is accessed?