What format does everyone use for their work instructions/change documents?

We have a current debate going on in the office. Some engineers use notepad to create work instructions for changes made on the network, while others use Microsoft Word. Word allows engineers to highlight certain important aspects of the change or insert diagrams and tables. The drawback is that when copying and pasting commands from word it can result in extraneous characters such as carriage returns etc. Which method have you found that ensures accuracy with cut and paste, but also allows the ability to insert diagrams and change text color in work instructions?