Thanks for posting. Depending on the template you may be able to move the dividing line. Can you tell me the name of the email you are working on and where you would like the line to show?
Thank you for reaching out to us. Currently we do not have a feature to add a column to a template. You will have to pick a template that already has a column design. You can search Left Sidebar or Right Sidebar. We do have a basic template that has the column design.
A little FYI, Templates with side columns are not mobile friendly. With more and more people reading emails on mobile devices you want to make sure your template is mobile friendly. Here are some tips to design a mobile friendly template. All of our single column templates are mobile friendly.
The templates are all customizable. You can change the colors to fit the branding of your company. We recommend using just a few colors that match your company logo.