The basics of the HTML text markup language and the principles of cad placement of CSS style language commands are set out The method of development of a standard layout of an electronic textbook, structural construction of chapters and sections, creation, placement and editing of links and CSS files . is given. The issues of including graphic materials, interactive applications and multimedia in the textbook are considered in detail . Figures and description of the interface and panels of the program "e. Book Maestro. It is intended as a teaching aid for teachers of higher educational institutions engaged in the development of educational publications, and can also be useful for graduate students and masters during the period of educational practice. ;Griff:Recommended by the Ministry of Education and Science of universities for university polytechnic education as a teaching aid for university teachers engaged in the development of electronic educational publications