Nikon D5500 - Manual (Page 127)

103 More on Photography
• To choose the number of intervals:
• To enable or disable exposure smoothing:
Selecting On allows the camera to adjust exposure to match
previous shot in modes other than M (note that exposure
smoothing only takes effect in mode M if auto ISO sensitivity
control is on).
Highlight Number of times
and press 2.
Choose the number of intervals
and press J.
Highlight Exposure
smoothing and press 2.
Highlight an option and
press J.