Type and layout - Glassine

All of it is in Settings → Editor, under Type and Layout, and all of it is live in the window behind the settings card.

Type

Setting	Default	Range
Font	Helvetica Neue	Every family installed on the Mac, plus the system faces at the top of the list: New York (system serif), San Francisco (system), SF Rounded, SF Mono
Size	16 pt	11–32 pt, also ⌘+ / ⌘− / ⌘0
Line height	1.55×	1.0–2.2×
Paragraph spacing	0.65 em	0–1.5 em
Letter spacing	0 pt	−1 to 2 pt
Larger headings	On	H1 at 1.5× the body size, H2 at 1.25×, H3 at 1.1×; off, every heading keeps the body size and shows only as bold
Center headings	On	In the editor and in Review

Layout

Setting	Default	Range
Column width	660 pt	420–1100 pt. The text sits in a centered column of this width; a narrower window narrows the column with it
Top margin	96 pt	24–240 pt. The space above the first line. Typewriter scrolling takes over this space while it is on

The sidebar’s width is set by dragging its edge and remembered.

Review

Review has its own scale, ⌘+ and ⌘− while a page is showing, from 60% to 200%; ⌘0 returns to 100%. Each Review style brings its own typography — Book’s serif and drop caps, Mono’s monospace — and does not follow the editor’s font.

⌘I