User:Animalrescue/sandbox

Hi! I tried to edit this page:

https://en.wikipedia.org/wiki/My_Big_Gay_Italian_Wedding#Production_history by changing the text St. Luke's Theatre into a link to that wiki page.

and I was able to deduce how to MAKE the link, BUT somehow I also inadvertantly inserted a pale blue box! Would someone be kind enough to tell me how to either 1) remove this box or 2) not do this again the next time I make a link.

Thanks so much!

Animalrescue (talk) 22:13, 3 August 2017 (UTC)