I am having an issue trying to get a Google Tag Manager script into the <head> section of my web pages. I have inserted the code into the file:
/my_changes/hooks/index/scripts.post.tpl
As recommended in other posts but it does not show in the source code. I have tried both with and without {literal}. I have also tried to install it in the "default" layout in the custom HTML code box as also suggested but the code just disappears when I hit "save".
Any direction would be appreciated.