Take caution when copying and pasting content from any source. Many times hidden style code will also be copied along that could break with best practices and introduce inaccessible content.
You can avoid hidden style code from being placed into your guide using the Rich Text Editor.
For example:
Version 2 - Paste, Paste as Plain Text, Paste from Word
![Rich Text pasting options v2 screenshot](//s3.amazonaws.com/libapps/accounts/101573/images/pasting_options_bigger.PNG)
Version 1 - Paste from Word
![paste from word v1 screenshot](//s3.amazonaws.com/libapps/accounts/101573/images/past_from_word_v1.PNG)
Use these buttons in the top right-hand corner of the Rich Text Editor to paste as plain text, or to paste from Word without copying unnecessary formatting. If you use these options you will have to put your headings, hyperlinks etc back in afterwards using the other Rich Text Editor tools provided.