Quick Input of Fractions with Numerator 1

In math mode, we want to generate a fraction with 1 as the numerator and automatically position the cursor in the denominator by typing the key sequence 1 /, enabling seamless input of the denominator.

You can implement this functionality in the following way:

1. Click Tools → Developer Tools to activate the Developer menu

2. Click Developer → Open my-init-texmacs.scm

3. Add the following code at the end of the file

(kbd-map (:mode in-math?)
         ("1 /" (begin (math-insert `(frac "1" ""))
                       (go-to-previous-word))))

4. Restart Liii STEM

Now you can smoothly input a fraction with ​​1 as the numerator​​ in math mode by typing 1 /, with the cursor automatically positioned in the denominator for immediate editing.

The original article was published on September 13, 2019, on the WordPress blog at http://tmml.wiki. On April 30, 2022, it was published as the first article on Mogan Planet. This version includes moderate revisions.