What have I done?

[lexcor]

Newbie sailing right along until I went to change "sales message goes here." I changed message to my store name.Then I uploaded It ( I know now all I had to do was refresh broswer)Well I knew that later on I was going to change stk header to my own, so I edited store name to something else.Uploaded it also.Thats when everything went crazy.My store shifted all the way to the left and got really huge.At the top of website it has a warning:cannot modify header info.-headers already sent by (output started at home/lexcor/public_html/store/includes/languages/english/classic/header.php:40)In home /lexcor/public_html/store/includes/int_includes/int_templates.php on line 78. Can anybody help me with this? ( in very basic terms) Thanks

[Kim]

https://www.zen-cart.com/tutorials/index.php?article=87

[lexcor]

Thanks!I'll try them out.

[afo]

Make certain you use a text editor like Notepad or Crimson Editor (a nice, free program that allows you to see those pesky line numbers) when editing php files. They'll help you avoid that type of error.