Toggle between two reading layouts from the Layout control in the toolbar, or set a default under Inbox options (the gear) → Email settings → Reading. Both the toolbar toggle and the settings control share one preference, so a change in either is reflected everywhere and syncs across devices.

• Split— the email list and the reading pane sit side-by-side. Available on screens 1024 px and wider.
• Focus — the message reads full-width; the list shows on its own when nothing is selected.

In Split view, the dividers between the email list, the reading pane, and the CRM context panel are draggable. Your widths save automatically and sync across devices via the user_ui_preferences table.

• List ↔ reading pane — clamps between 320–720 px.
• Reading ↔ CRM panel — clamps between 240–480 px.
• Double-click a divider to reset to the default width.
• Focus a divider with Tab, then use ←/→ to adjust by 16 px steps.

The reading pane uses a single scroll container. The subject, From/To headers, and email body all scroll together — no nested scrolls, no pinned subject row. The bottom of the email gives you a fresh Reply / Reply All / Forwardaction bar so you don't have to scroll back up.

The toolbar is organized into two rows. The top row leads with the Compose button (far left) followed by your inbox tabs (Inbox, Starred, Snoozed, Sent, Drafts, Scheduled, Done, Trash). The second row holds the All / CRM / Cold filter, the category Filter, Sort, Layout, search, and the gear.

• Sort and Layout stay visible — they are view states you toggle often.
• Inbox options (the gear) holds the set-once / less frequent controls: Row density, Refresh, Keyboard shortcuts, and Email settings (which now includes your email notification preferences inline — no jumping to a separate page).

• Sidebar Compose — always visible on the left rail.
• Toolbar Compose— the primary button at the far left of the toolbar's top row.
• Keyboard — press C from anywhere in the inbox.