LyX ⇒ Font size changes

[xconwing]

Hello all,

How do you adjust the font size of equation in Lyx pannel, and the font size of equation in the actual pdf output?

I'm aware that you can use Text Style to do the font size but that is done manually one-by-one, which could cause inconsistent in size. What I'm looking for is the default size setting.

Thanks ahead,
X