That statement is true
in excel, you could enter point mode by pressing any keyboard navigation such as page down, page up, or the arrow keys or by clicking any cells in the worksheet
This mode will select a cell or range as formula operand
A pro of HCI technology is that its user friendly and a con about it is that you have to teach the user what to do or guide them!
I've included my code in the picture below. Best of luck.
Answer:
In HTML file
<body style="background-color:orange;">
Or
In CSS file
body {
background-color: orange;
}