Hello,
Can anyone help? I have difficulty reducing the header text size on my homepage. Can anyone share the code please ? thanks 
my website: outerhype.com
Are you talking about Banner heading text in your homepage? If so, just add the following code at the bottom of the theme.css file.
h2.hero__title.page-title.h1 {
font-size: 40px;
}
Thank you very much!
You made my day hehe
You are most welcome dear! if you wish to have any development or customisation related changes in future, kindly reach me! Good luck!