Page Elements Tags for Layouts

The section of a Layouts template is made up primarily of sections and widgets. Sections mark out areas of your page, such as the sidebar, footer, etc. A widget is an individual page element such as a picture, a blogroll, or anything else you can add from the Page Elements tab. You can include any HTML you like around the sections in your template.
A tag can have the following attributes:

• id - (Required) A unique name, with letters and numbers only.
• class - (Optional) Common class names are 'navbar,' 'header,' 'main,' 'sidebar,' and 'footer.' If you switch templates later, these names help Blogger determine how best to transfer over your content. However, you can use different names, if you like.
• maxwidgets - (Optional) The maximum number of widgets to allow in this section. If you don't specify a limit, there won't be one.
• showaddelement - (Optional) Can be 'yes' or 'no,' with 'yes' as the default. This determines whether the Page Elements tab will show the 'Add a Page Element' link in this section.
• growth - (Optional) Can be 'horizontal' or 'vertical,' with 'vertical' as the default. This determines whether widgets within this section are arranged side-by-side or stacked.