I'm a Windows guy trying to help a Mac Book owner with less than zero technical skills.
She wanted to get to a few web sites (using Chrome) easily by having icons for them on the dock. After some research I figured it out. I dragged the icon to the left of the URL in Chrome to the desktop. I renamed the icon label on the desktop. I got an appropriate logo for an icon from the web and used Preview to copy and paste the icon into the appropriate place in the desktop "get info" window. I dragged the new window icon from the desktop to the left of the trashcan on the dock. I then trashed the icon from the desktop. I put 3 of these shortcuts on the dock. They worked perfectly. Now 3 days later, when these icons on the dock are moused over and enlarged, they have question marks over them and they no longer work. The Chrome icon on the dock still works, but not my shortcuts. What happened?
She wanted to get to a few web sites (using Chrome) easily by having icons for them on the dock. After some research I figured it out. I dragged the icon to the left of the URL in Chrome to the desktop. I renamed the icon label on the desktop. I got an appropriate logo for an icon from the web and used Preview to copy and paste the icon into the appropriate place in the desktop "get info" window. I dragged the new window icon from the desktop to the left of the trashcan on the dock. I then trashed the icon from the desktop. I put 3 of these shortcuts on the dock. They worked perfectly. Now 3 days later, when these icons on the dock are moused over and enlarged, they have question marks over them and they no longer work. The Chrome icon on the dock still works, but not my shortcuts. What happened?