The SiteMaker 'Editor' is a floating panel on the page that shows settings and provides feedback for selected objects. You can edit any object on your page or add new objects using your mouse. A single click on an existing object will allow you to drag and resize them, while a double click will allow you to edit the contents of the object, e.g. text.
When you select an object, the Editor will display a number of tabs which allow you to change the settings on that object, e.g. when editing text, the 'Info' tab will allow you to change the position on the page, while the 'Font' tab will permit you to change the font. Different objects will have different settings.
If you cannot find or access an object on the page you can use the Editor. By locating the object name from the drop down and selecting it you can change its position, size or style.