Is it possible, that instead of categories to pull the posts from, it could be done with tags? We have others that post on our site and would be easiest if we could go back and drop a simple tag in their posts such as “newsletter” instead of having a category they can easily see and select themselves. We’d like to easily control what gets emailed out.
I’m working on creating my own custom theme. How would I do that?
Also I noticed with my custom theme, that in the preview window, everything looks good, but when I click “create email” it seems to erase the last few lines of code and I have to manually put the missing code back in. What could be causing that?
About your theme can be a wrong HTML. The preview is made with an iframe (the browser generates it), while the editor is something of really different and a not perfect HTML can lead to problem.
Try to double check the HTML code of the theme.
Form version 3.3.5, the default theme contains configuration examples to add tags, categories and even custom post types filters.