require the user to know much HTML to make accessible Web pages?
This depends on the type of tool. Some tools assume no knowledge of HTML or other markup language, and others either require some knowledge, or allow the user to edit source code directly when needed. With tools that do not conform to ATAG 1.0, the user often must know some HTML to be able to fix accessibility problems that the tool creates.
Not necessarily. This depends on the type of tool. Some tools assume no knowledge of HTML or other markup language, and others either require some knowledge, or allow the user to edit source code directly when needed. With tools that do not conform to ATAG 1.0, the user often must know some HTML to be able to fix accessibility problems that the tool creates.