spyder change editor default font/scale/zoom

Right clicking in the text window there are menus Zoom in, Zoom out and Zoom reset

Seems that I didn't inspect Preferences attentively enough initially. Right answer is:

Preferences → Text and margin font style → Size

EDIT: updating answer according to comments.

In the latest versions of Spyder IDE path to changing font size is:

Tools → Preferences → General → Appearance → Fonts

EDIT2 (since march 2021):

Tools → Preferences → Appearance → Fonts