How do I reset default font?

I don’t know how I’ve managed to do this, but somehow I’ve gotten my Scrivener project to the point where every new page I start is in 12-point Courier New instead of 18-point Georgia. How would I go about resetting this?

To change your default formatting, go to the Editor tab of Tools > Options… and use the format bar and ruler to adjust the sample text. The blue A button on the left of the format bar opens the font options. Click OK to apply the changes and close the Options. Your new defaults will apply to all new documents you create (in any project); to change existing documents to match, select them in the binder (Ctrl- or Shift-click to select multiple) and then choose Documents > Convert > Formatting to Default Text Style.