To switch to the page view, you can either click on a page name as listed under PAGES: in the workspace, or select Quick - Goto Page View in the main menu. If you are just starting, all of your pages will look the same: they will all be blank white. To add components to your pages, right-click where you would like to place a component and select the desired component type from the popup menu that appears. There will be some times when you will see a big red X through a component. This typically occurs when the component does not have any valid data to display, which is often the case when you first add the component because you haven't configured it yet. It can also occur if you load a document created in a full version of DAQFactory in DAQFactory Express and the document has components that aren't supported in Express.
Whenever you add a new component to a page, the component will be listed in the Workspace under the page it was added. You can then click on the component in the Workspace and it will be selected. Components are given a default name corresponding to their type (prefixed by an underscore). As you will see shortly, you can give your components other names and the new name will be reflected in the Workspace.