After you move a section into your resume, the right column panel for that section will show a link to add a new item to the section:

You can also add new items by clicking the "plus" image under the logo for that section in the left column panel:

Clicking either link will add a new item to that section of your resume - in the screenshot below it's the Employment History section:

Just like when editing the heading for a resume section, double clicking your mouse on a line in the item will open it for editing:

Click the green checkmark image to save your changes or the blue and yellow eraser image to discard your changes. You can also edit the entire item at once by clicking the pencil image at the top right of the item:

This will open each line for editing:

You can now save or discard changes for each line individually or click the checkmark or eraser images at the top right to save or discard changes for all lines at once:

To remove (but not delete) an item from a resume section, click the right arrow image at the top right of the item display:

To remove and permanently delete an item from a resume section, click the trashcan image:

To change the order that items appear in a section, click the up and down arrow image and hold the mouse button down:

You can then drag and drop the item to its' new place in the resume section.

When you remove an item from a resume section, it's returned to the right column control panel for that resume section:

Just click on the item to return it your resume.

Next: Wrapping Up