The term "portable" in your search likely refers to . Most modern manga platforms now offer "Vertical Scroll" or "Webtoon" style formats, making it easier to read high-action drawing sequences on a phone without having to zoom in on traditional panels.
Much like a real manga artist, the protagonist often has to iterate on his magical constructs, showing that even in a fantasy world, perfection requires effort and revision. Genre Deconstruction: The term "portable" in your search likely refers to