My CHM is a help file for an application. The application uses F1 to open specific topics for help. Therefore the help file needs to be visible but not cover the application to much. The Content in this situation is text however the help project contains Images, tables, text, etc.
If the user searches for the word "audio" in the search and it takes them to a section or sub topic that is half way down in the Topic, they would like that section or subtopic to stay in the same place as they resize the help window. Using Bookmarks if the topic is large enough clicking the search link will place the results in the top left of the doc view window, however this is not necessarily the top of the topic.
Im not sure how else to explain what the user is seeing, sorry.
Please explain "Also whether it remains consistent depends on whether an absolute or percentage value has been added to it."
OK. I understand what they want now. Unfortunately there is no way of achieving what they want. A consequence of resizing the window is that you loose focus on what is selected in the topic. It is something that affects all windows, not just CHM files. Try selecting part of a web page and resizing the window. The same happens there.