Final answer:
To make a web page scroll vertically, content must exceed the browser window's height or a container with overflow set to 'scroll' or 'auto'. Use CSS to adjust these properties accordingly.
Step-by-step explanation:
To make a web page scroll vertically, you typically need to ensure that the content of the page extends beyond the height of the browser window. This can be achieved by adding sufficient content, such as text, images, videos, etc.
If you want to create a scrolling effect for a section of the page that does not extend the full window height, you can use CSS to set a fixed height for that element and set the overflow property to 'scroll' or 'auto'. Here is an example:
div {
height: 500px;
overflow-y: scroll;
}
This CSS rule will give a div element a fixed height of 500px and allow it to scroll vertically if the content inside the div exceeds that height.
If the web page still does not scroll, you may also want to check for any CSS rules that might be setting the overflow property of the body or html elements to 'hidden', which would prevent scrolling.