The specific actions are as follows:
1. Open the MathType Formula Editor and go to the work page. Open the way there are many, according to their own habits open on it, as long as you can open it, whether it is from word or open from the desktop can be.
2. In the MathType menu, select Presets-validated functions. A dialog box will pop up later.
Select Presets-"Validated functions"
3. In the pop-up "validated Functions" dialog box, the types of functions are enumerated, and when you enter these functions in the work area, MathType can automatically recognize them as the corresponding functions. If the function you want is not available, enter your function letter in the "new Function" entry box below the dialog box, then click the "Add" button at the end and click OK.
Enter the function letter in the "new function" input box and click "Add"
4. Entering the corresponding function in the work area is automatically recognized as the style of the function.
Tip: If you don't want some combination of letters to be recognized as a function, you can also use the same method to delete the letter combinations.