Hey David,
Use:
.page-id-339 #content{width:42%}
https://startupwp.com/topic/customizing-your-theme/
Sorry you had to wait 3 days for an answer.
We don’t monitor this forum and we don’t receive notifications when people post for help. In the future make sure to post in the official forum https://startupwp.com/forum/ – where we check every single day.
Thank You
