### How to increase the size of the equation in LibreOffice impress

Hello,
I have prepared a ppt in which i have typed an equation/formula, But the size (font size) is small (since the font size is automatically taken while writing the formula), and if i view the ppt in slideshow style, the formula that i have typed looks very small. So how do i increase the font size of the formula that i have typed..??
Thank you