Learn how to create flexible layouts using relative units in CSS. New relative units added in CSS3 include vw(viewports width), vh(viewports height), vmin(minimum of viewports height and width), and vmax (maximum of viewports height and width).
When it comes to write a
Context Sensitive Help
(an online help that is obtained from a specific point in state of software to provide help with that state)
first we need to make the file that contains all topics, which are given exclusive IDs. …