Color screen e-books were suitable for reading PDF-files, mainly depending on the resolution and screen size of the e-book. Generally speaking, the higher the resolution, the clearer the picture, and the larger the screen size, the more comfortable the reading experience. If the PDF-file is large, it is recommended to use a larger color screen e-book, such as a 10-inch or 12-inch e-book. If the PDF-file is small, it is recommended to use a higher resolution e-book such as an 800×600 resolution e-book. You can also consider choosing an e-book reader that supports automatically adapting to the size and resolution of the document to improve the reading experience.