Hello, In uVision2, when the cursor is on top of a keyword (e.g. the keyword const) and I press the F1 key, I don't get the correct help. In the example given, the file C51 Library Functions is opened, while the explanation is actually in the PDF file C51 User's Guide. Two questions: 1. Is there a way to 'connect' other help files besides the original one to the button F1? In this case, depending on the location where the explanation of a certain keyword is given, the correct document could be opened. 2. Sometimes, include files with an extension other than .h are used (eg. .r, .dd). However, those extensions are not taken into account for coloring the keywords. Is there a way to also include other than .h files for the keyword coloring process? If so, how? Rgds, Geert