Add layout columns in 'Columns count', choose pane on 'Palette' and set on 'Editor'
In the 'Layout', set width for each pane
Choose Pencil icon to edit the layout, where you can edit Layout name, columns quantity, panes order...
To copy an available layout, click Doubledocuments icon on the layout you want to copy, a Paste layout button will appear on top, click on it to paste the layout. New copy layout has same name with old one, you should set its own name.
Select Trash icon to delete a layout
Enable responsive function
Choose 'Responsive' in General tab to enable responsive functionality
Add responsive layouts
In layout setting, choose numbers of responsive layout in 'Number of responsive steps', new layout tabs will be show next to primary layout.
Set layout columns and define a name for layout.
Select pane number on the right and set to blank square, panes should be added in the same order in all layouts.
Set column width for each column.
Set default layouts
To change a different layout default (layout will be set when creating new page), select Change default layouts button.
Select layout you want to be default in Standard layout and default layout for detail page should be set inStandard detail layout