Do you have problems highlighting a long passage sometimes where the mouse seems to either get a small part of the passage or goes too quickly all the way down the page? Here are a few solutions to make highlighting easier: 

• Hold the shift key down and use the arrow keys to highlight. Or even put your cursor at the beginning, hold shift down and click at the end of the passage and it will be highlighted.
• Reduce the size of the page you're looking at to 50% so you see the whole page. (There's a percentage drop down on the toolbar at the top.) Then highlight.
• Put your cursor at the beginning of where you want to highlight and then hit the F8 function key at the top of your keyboard. Then use the arrow keys on the keyboard to highlight the part you want.