In the left-hand admin menu, click the Settings tab.  There you will find and click the Edit Layout option.

Once you are in Edit Layout mode you can modify the contents of the header, footer, and 'welcome text' areas.  To modify the content of a section, hover over it and then click the "Edit" button in the top right corner of the section you wish to modify.

Once you activate the Edit mode, you will be presented with a standard "WYSIWYG" (what you see is what you get) editor.(1)

Now you can type text directly in to the box (in this example we are modifying the header area).  Use the formatting tools to change text size, color and alignment. (2)

The paperclip icon is how you upload graphics (3) (see next step)

To insert a graphic in to your page layout, make sure your cursor is where you want the graphic in the edit area, then click the paperclip icon in the WYSIWYG tool bar (1).  

After you click the paperclip button, you will be presented with an Upload a File dialoge box (2).  

Click Select File (3), navigate to the file location on your desk top and click to select it, and then click the Upload button (4)

If you need to add a hyperlink to an item, select it and then click the Hyperlink icon. (1)

When you are finished with the layout - click the Save icon.

Each of the editable areas also will accept HTML.  Click the HTML edit button to toggle to HTML view - now you can edit the HMTL to your liking, or copy/paste out of an HTML editor.  

Click the HTML edit button again to toggle back to normal view.

(If you copy/paste out of an HTML editor remember all links must be http:\\ formatted and not local)

When you are finished with the layout - click the Save icon.

The Welcome Text area just below the Header, as well as the Footer at the bottom of the page all share the same editing options.  

Along the top of the Edit Layout admin bar are options to control how the public side looks.  The first option is Site Embedding.  This option is used when you want to embed the search and registration code in to a web page on your own web site.  This is an alternative to having a unique URL for your registration site, and can instead embed the public page anywhere.  To use this feature, enable the Embedded Mode option check box.   Then click the Get embed script button, copy the resulting HTML, and embed in to your own web site.  

Note: The header/footer on the Edit Layout page will not be a part of the embed, however anything you put in the 'welcome text' area will.

The second option is Components.  Here you can enable or disable the Header, Footer or Welcome text areas - If there is a check mark in the box, then that component will display on your public side.

You can default to a particular view for the public side - Grid or Tile.  If you enable both, then the public can toggle between the two.

Grid View is the searchable list style - which is good for many courses.

Tile View puts each course in a graphic tile box with information and a graphic - its better for fewer courses.

When finished editing, click the "Turn Off layout edit mode" and also be sure to click the save disc icon for each area.