how to adjust center column width?

Okay, you were talking about "additional images". Since they are optional, we can't tell they are missing unless you tell us they are supposed to be there.

They are totally not displaying in your current template. Since they display in Classic, you have the image files named right, so something in your template is messed up.
What is in /includes/templates/your_template/templates/tpl_product_info_display.php between these comments?

here is the code:

<!--bof Additional Product Images -->

<!--eof Additional Product Images -->

Your post shows this:
//
require(

but it appears that the original code was all on one line.
// is a PHP comment marker, so the additional images call has been commented out of your template. Remove the // to restore them.

awesome!!! :clap: I am very very appreciated for your help, you are a real master of using zencart program

hello,dear, i have read all the details of this, and do according this, but i can not adjust the width of my main page, pls give me the answer how to do. i use the version 1.38a, thanks.

Please give us a link to your site so we can see what you have now, and how the stylesheet works. Then we can give you the right answer.

Hi,
I had the same problem of center comlumn.
I tryed to understand previous explanations and I lost the rest of my dryer:laugh:

I resolve the problem more simply... I think, more simply.
Perhaps, this is not the same problem for other person who read this thread

You can try this
config > layout setting > Column Right Status - Global is off ( of course:unsure:)
and write in the windows Define Pages Editor > define_main_page.php
WHITHOUT using <p></p> tags
I swum more than hour just for this damn tag.
If this does not work for you, you can go back to upper explanations

Good luck
Regards