To modify some equation elements, you can also use the right-click menu options: For example, you can remove the italic format for ordinary words that are not variables or constants. Then use the necessary buttons on the Home tab of the top toolbar to format the selected part. The selected part will be highlighted in blue. Select the necessary part of the equation by clicking and dragging it. The underlined style can be applied to the entire equation only, not to individual characters. If necessary, you can change the font style ( bold, italic, strikeout) or color for a whole equation or its part.

The letters within the equation are italicized by default. All the equation elements will change correspondingly. To increase or decrease the equation font size, click anywhere within the equation box and use the and buttons on the Home tab of the top toolbar or select the necessary font size from the list. To delete the added manual line break, right-click on the mathematical operator that starts a new line and select the Delete manual break option. Once the manual line break is added, you can press the Tab key to align the new line to any math operator of the previous line. The selected operator will start a new line. You can also insert a line break in a specific position by right-clicking on a mathematical operator and selecting the Insert manual break option from the menu. If the equation is too long and does not fit a single line, automatic line breaking occurs while typing. When entering the values of the mathematical expressions, you do not need to use Spacebar as the spaces between the characters and signs of operations are set automatically. Note: currently, equations cannot be entered using the linear format, i.e. To add a new row or a column in a Matrix, you can right-click on a placeholder within it, select the Insert option from the menu, then select Row Above/Below or Column Left/Right.To add a new equation within Cases with several conditions from the Brackets group (or equations of other types, if you've previously added new placeholders by pressing Enter), you can right-click on an empty placeholder or entered equation within it and select the Insert equation before/after option from the menu.To add a new argument that goes before or after the existing one within Brackets, you can right-click on the existing argument and select the Insert argument before/after option from the menu.To add some new equation elements you can also use the right-click menu options:

How to insert equation in word as latex