Terry,
Ok, I would like to think that there is a better way that what I know but I am going to tell you what I know.
I have a blank site, so I switched to that theme to test it and make sure that it works.
Here is what you can do:
Step 1:
Under appearances —> click on edit
This will take you to the style.css sheet.
Step 1a:
Note: the first thing that I always do when I get to something like this is do a “control a” to select all of the text and then do a “control c” to paste that into a notepad. This way if something goes wrong you can paste the original saved CSS code back in there.
Step 2:
do a “control f” find command for: #page
Step 2a:
You will find this:
#page {
margin: 2em auto;
max-width: 1000px;
Step 3:
Change 1000px to 1500px
Step 4:
Scroll to the bottom and click: Update File
Let me know if this makes sense and works.
-Renee’