Other Themes in OpenScholar are older themes with limited mobile friendliness. These means that the "Other Themes" may not behave desirably on mobile devices (phones, tablets, etc.). These theme also do not follow Harvard branding.
The Columns widget is essentially a layout tool that provides a way to display content within columns on your web page. Similar to the Tabs widget, it displays content from other widgets in an organized way.
Tip: You need to create the content widgets before setting up a columns widget.
You have enormous control over the look and feel of your site. While more detailed documentation is available on the following points, it's good to get familiarized with some basic concepts.
You'll want to set a "Theme" from a number of choices. Themes provide consistent visual presentation for you site. You may choose from one of many themes included with the Project, or have a custom theme developed for you by an outside designer. Read more about Managing the Look of Your Site
The Layout portion of the Control Panel (under Appearance) allows you to choose what elements should go where. Each app page can be customized individually via the drop down list. For example, you may want to have a widget of a list of your co-authors appear on your publications page, but not on your blog. The Layout section is where you make these choices.