First, from the Top Editor Bar, select +New, and Post.
First, enter a Title (e.g. New Prices for Fuel pump).
Second, set the page layout to Fullwidth. You do this by selecting the down arrow next to the Page Layout selector and choosing Fullwidth.
From the Divi Builder, choose, “Insert Columns”, and choose the one column wide option.
Finally, move over to the right side of your editing page, and find the section labeled “Categories”. Select the Announcements category, and deselect Uncatagorized.
Above this section is Publish, so select this now to save your work.