Flash Duration

Key Flash Duration in ExCfgShtFmtFlash refers to the time interval in seconds - decimal allowed - during which, any cell containing the Deriscope function will keep displaying a color format indicative of the recent change in its contents.
A large value may be useful during spreadsheet auditing, although only when combined with the setting Flash Everywhere = true
Setting a zero or negative value is equivalent to switching the flash feature alltogether off.
If the entered value is not a multiple of miliseconds, it is rounded to the nearest value that is such a multiple.