HubSpot default themes are only available in new HubSpot accounts. If you would like to have a standard HubSpot theme installed in your existing account, follow these instructions to ensure that your account is compatible with these themes.
What are a standard theme's base templates
HubSpot theme base templates include: a blog template, landing page templates, site page templates, and system templates. Each theme uses a different global header and global footer group.
Every standard HubSpot theme includes a blog template. This template is made up of the theme's global header and footer, but also includes various sidebar modules such as a blog subscription module and a "tabber" custom module.
The blog template layout can be found in your Design Manager in the Theme Name Blog folder (Templates / Custom / Blog / Theme Name Blog).
Site pages templates
Each base HubSpot theme includes several site page templates that can be used for creating interior and thank you pages. These templates are made up of the global header and footer groups, as well as flexible columns that let users add modules to a particular page.
Theme site pages template layouts can be found in your Design Manager in the Theme Name folder (Templates / Custom / Page / Theme Name).
Landing pages templates
Every base HubSpot theme includes several landing page templates. These templates are similar to the site page templates but use a different global header without navigation and include a form in their layouts. They also contain flexible columns that let users add modules to a particular page.
Theme site pages template layouts can be found in your design manager in the Theme Name folder (Templates / Custom / Page / Theme Name).
HubSpot default themes include an various system templates for email preference pages, error pages, and password protected pages. These templates can be customized to include default content specific to your brand.
The Email Preferences template is used by your subscribers to manage their communication preferences, the Email Backup Unsubscribe template is used by your subscribers to unsubscribe from their communication, and the Subscription Update Confirmation template is used by your subscribers to confirm when they make a change to their email preferences.
These three email preferences templates can be selected in your Email Settings (Content > Content Settings > Email).
HubSpot default themes include a 404 template which is used when the browser client is able to communicate with the server, but unable to locate the requested page. They also include a 500 error template which is used when the browser client is unable to communicate with the server. These error template are set to be your site's error pages in Content > Content Settings > Page Publishing.
This template is set to be your site's Password prompt page in Content > Content Settings > Page Publishing.
Modifying standard theme templates
You can clone any template to create a variation that you can customize, while leaving the original template untouched.. By cloning a template, you ensure that you always have a master template that you can refer back to.
You can also always roll back a revision of a template and or page, if your are unhappy with a change that you make.
You can customize your template layouts, using the template builder in the design manager.
To learn more about structuring templates, check out this article. In addition to making changes to your templates, you can also add modules directly to particular pages using the content editor on any page created with a template that uses a flexible column.