Setting Default Fonts
You can assign a default font and size used to make new objects in a patcher. There is a default font for newly created patchers set in the preferences window, and a default font specific to a patcher set in the patcher inspector, or by using the font panel.
Setting the default font new patchers

Setting the default font for a single patcher

Alternatively, the font panel will show the default font for a patcher when it is visible and the topmost window is an unlocked patcher window with no objects selected. If you change the default font and/or size when no objects are selected, the patcher's default font will change, and the next text object you create in the patcher will use the new font.