In the back end, content can be updated by selecting the menu option ‘Content'. Here are the various menu options related to ‘Content':

Remember that your content (‘items') are arranged by Category, and each Category belongs to a Section.

You can view all the Content Items by Section - this will bring up a sub menu where you can select the Category for which you want to view the items.

Or you can select to view All Content Items. This will display all the Content items (this is also the one that I use the most). In this option you can filter the results by Section, Category or both - so this is very convenient.

Static content items are items that do not belong to either a Category or a Section.

Let's select ‘All Content Items'.

This is the Content Items Manager, where you can see all your content items in one glance.  

You will see that some items have a green tick in the ‘Front Page' column. This means that THIS particular item will appear on the front page. You can make ANY item go to the front page by selecting this option. (The sequence in which they appear, however, is managed by the ‘Frontpage manager').

If you click on the item, the editor window will open up.