Pink lines

Hey, I have a problem on my mac on the App Sketch with pink lines which appears on my pages, for information I have not create myself this pages somebody share with me all the pages I don’t know if the problem come from that ?

Please can you help me ? Sorry for my bad English, I am from Switzerland. Thanks again !

Hey, this is a layout grid that’s enabled. You can disable it by going to View > Canvas > Show Layout or press ^L