TOPIC 1: Relative URLs

Relative URLs can be used when linking to pages within your own website. They provide a shorthand way of telling the browser where to find your files. If your site is organized into separate folders or directories, you need to tell the browser how to get from the page it is currently on to the page it is linked to.

TOPIC 2: Border, Margin and Padding

When it comes to boxes, they will always have the same 3 properties used to control its appearance. Firstly, boxes have a border which separates the edges of one box from another. Next, there are margins, which sit outside the edge of the border. You can set the width of the margin to create a gap between the borders of two adjacent boxes. Lastly, padding is the space between the border of the box and the content within it. Adding padding can increase the readability of its content. All of these elements can be adjusted to alter the appearance of a box.

TOPIC 3: Hiding Boxes Visibility

One thing I found interesting in this chapter is hiding the visibility of boxes. The visibility property allows you to hide boxes but leaves a space where the element would have been, commonly used with navigation buttons.