Thin blue line

[Aubrey]

Hey D, 

long time no talk! I have been working on this pic over the course of several days and just tonight this blue line is now in my pictures. Do you know what it is or how to get rid of it? i need to print this pic asap.

Screenshot attached

thx, aubrey 

[Damien Symonds]

Isn't it a guide????  Just press Ctrl H to hide it.

[Aubrey]

glad i can always count on you!

[Damien Symonds]

Also, if you choose your Move Tool (V) and hover over the guide, you should see your cursor change, and you can drag the guide off the screen.