When I am reading someone else code I spend a lot of time figuring out a section of code only to realize its for some corner case. If only there is a hint thatz

When I am reading someone else code I spend a lot of time figuring out a section of code only to realize its for some corner case. If only there is a hint thatz not the main logic will save lot of time. The fix everyone will immediately suggest is proper commenting which is clearly not working. I am just exploring alternatives.