1, the double spelling input method is a simplification of the full spelling input method. The initials are replaced by letters and the finals are replaced by letters. The commonly used pinyin input method is spelling, and the complete pinyin code of a word or word should be input completely when inputting.

2. Quanpin, an input method, uses Quanpin two-tone Chinese character input method. You can enter a single Chinese character and a two-word vocabulary.

3. Double spelling (also called doubles) is an input method developed on the basis of pinyin input method, which can be regarded as an improvement on the total spelling. By mapping each initial or vowel containing multiple letters in Chinese Pinyin to a key, each tone can be typed with this key at most twice (see the "Concept Details" section below for details), the typing speed of Pinyin input method is greatly improved. This correspondence table between initials or vowels and keys is usually called a double spelling scheme, which is not fixed. At present, most popular pinyin input methods support double spelling, and all have their own different schemes, and users can also define their own schemes. As long as you remember the scheme you want to use, you can master the double spelling input method. At present, the common schemes are: natural code double spelling scheme and pinyin plus double spelling scheme-at present, most input method software adopts the former scheme or is based on the former, and the latter is relatively unpopular, but it is widely used in electronic dictionaries and other platforms.