When using mathtype to insert a formula in a paper, if you need numbers, click "Right Number" (if you only need to insert text lines, click "Inline").

Because the paper is in column format, the single-line formula is too long, which leads to the serial number, so it is necessary to split the formula.

Modify the current formula size only: Open MathType formula editor software. Click the "Size-Definition" command in the menu bar to open the "Define Size" dialog box. In the "Define Size" dialog box, you can modify the MathType font by changing the size of the pt value.