To add content to a page, click the "Add Component" box in the lower right of the content section. This will add something to the page that you have selected. This will be the page that shows up in bold black text. In the example below you would be adding content to the "New Page."
After clicking this you will be able to choose what you would like to add. Artifacts are files that you have uploaded. If you are just adding text there is a text area option. You will notice a second content area in the picture above, you are able to add things in that area as well. Typically something like this would be used to have the text area in the larger content area to describe you and a headshot or picture of you in the small content area under the pages. If you have placed multiple artifacts or text boxes in one content area you can reorder them by using the green arrows that appear in the area.