[css] CSS - Overflow: Scroll; - Always show vertical scroll bar?

So currently I have:

#div {
  position: relative;
  height: 510px;
  overflow-y: scroll;
}

However I don't believe that it will be obvious to some users that there is more content there. They could scroll down the page without knowing that my div actually contains a lot more content. I use the height 510px so that it cuts off some text so on some pages it does look like that there is more content, but this doesn't work for all of them.

I am using a Mac, and in Chrome and Safari the vertical scroll bar will only show when the mouse is over the Div and you actively scroll. Is there a way to always have it displaying?

This will make the scroll bars always display when there is content within windows that must be scrolled to access, it applies to all windows and all apps on the Mac:

Launch System Preferences from the ? Apple menu Click on the “General” settings panel Look for ‘Show scroll bars’ and select the radiobox next to “Always” Close out of System Preferences when finished

This will work with iPad on Safari on iOS 7.1.x from my testing, I'm not sure about iOS 6 though. However, it will not work on Firefox. There is a jQuery plugin which aims to be cross browser compliant called jScrollPane.

Also, there is a duplicate post here on Stack Overflow which has some other details.

Please note on iPad Safari, NoviceCoding's solution won't work if you have -webkit-overflow-scrolling: touch; somewhere in your CSS. The solution is either removing all the occurrences of -webkit-overflow-scrolling: touch; or putting -webkit-overflow-scrolling: auto; with NoviceCoding's solution.

Try the following code to display scroll bar always on your page,

::-webkit-scrollbar {
  -webkit-appearance: none;
  width: 10px;
}

::-webkit-scrollbar-thumb {
  border-radius: 5px;
  background-color: rgba(0,0,0,.5);
  -webkit-box-shadow: 0 0 1px rgba(255,255,255,.5);
}

this will always show the vertical and horizontal scroll bar on your page. If you need only a vertical scroll bar then put overflow-x: hidden