HTML 

Layouts 

You are welcome to mix Backend Layouts and Grid Layouts like you need it. Please refer to

• Backend Layouts
• Gridelements

Columns width 

You can setup the width of margin and main columns supported by the Constant Editor.

See categories:

• [START - TEMPLATES - GRID - 2 COLUMNS]
• [START - TEMPLATES - GRID - 3 COLUMNS]

Fluid Templates 

Use your own fluid templates. See Constant Editor > START – TEMPLATES*