The communication of ideas, imagined concepts or lived experiences as a means of graphic representation, requires learning a graphic language that has its own concepts and values. The architectural sketch allows us to use the tools of writing and drawing with ease, to make use of what 'we have at hand' to scribble a concept in a way that allows the imagination to form games of shapes, lights and shadows, materials, objects and textures that can be interpreted as a representation of spaces. This volume presents a sequence of knowledge, through practical exercises; a range of options that can be developed at the pace and taste of each draftsman, from the first drawing of lines to the presentation of a general sketch; exercises explained to understand why an architectural sketch is made and how it could be a better way to work, to start the shape of the idea that will be transformed into a built space.