Common iTunes icons that people miss

Here are some common icons' that people miss in iTunes that can save a lot of time and frustration:

• The Exclamation Point!- This means the file is missing. 

• The cloud! There are three icons:
• The cloud in a box with a downward arrow means that the song is in the cloud and not on the computer (Needs to be downloaded) 
• The Cloud with a \ through it is that it isn't in the cloud (iTunes Match) 
• The cloud with an ! in the middle means the song is MIA on the cloud. 

Will add more as they pop up :)