Setting the 404 page
In Lambda theme you can create a page and set it to be your 404 page. To do that go to Lambda->General and set the Page Link option to the page that you want.That's all!
One page version
In Lambda theme it is easy to create a one page template version. All you have to do is create sections and assign a unique id to each.
After creating the sections add a menu using the section id's in the menu elements.
Take a look at the video on how to create a one page template : one page version video
Note: If you are going to implement more than one pages and you need to navigate to the one-page from them, you must use absolute paths when setting your menu links., i.e lambda.oxygenna.com/personal/#services instead of #services.
