dsh-zoom — Cmd/Ctrl +, -, 0 to scale the whole interface (not just conversation text)

[DC-507]

What it is

A small community plugin that adds a global UI zoom to the client: the sidebar, session list, menus, settings surfaces, overlays and conversation all scale together, from the keyboard.

Why

ui-theme.fontSize covers conversation content only; the chrome around it is fixed pixel sizes, and the shell has no page zoom (no View/zoom menu role, no setZoomLevel/zoomFactor, no Cmd+=/-/0 binding). On a 4K/5K display, or at a viewing distance, the interface stays small even at the largest text setting.

Install

Plugins → Add plugin:

github:DC-507/dsh-zoom

Pin a version with github:DC-507/dsh-zoom#v0.1.0, or install from the release tarball URL. The CLI equivalent is dsh plugin --profile desktop add github:DC-507/dsh-zoom.

Shortcuts

Shortcut	Action
Cmd/Ctrl + = (or Cmd+Shift+=)	zoom in one step
Cmd/Ctrl + -	zoom out one step
Cmd/Ctrl + 0	back to 100 %

Steps: 80 · 90 · 100 · 110 · 125 · 150 · 175 · 200 %. The level persists in localStorage; __dshZoom.get() / set(1.25) / step(±1) / reset() are exposed for scripting.

How it works

It ships as an ordinary bundle (dsh.bundle.patch plus a dsh.client half with immediately: true), applies zoom to document.documentElement, and binds the three chords in the window capture phase — which runs ahead of the shell's own document capture dispatcher. Zero runtime dependencies and no build step; npm test is a dependency-free DOM-stub smoke test.

Known limitations

• CSS zoom does not rescale viewport units, so the few overlay clamps that use 100vh/100dvh carry a build-guarded patch.
• Canvas-backed surfaces (terminal, editors, document previews) rasterize at the unzoomed size and look soft.
• The shortcuts do not fire while focus is inside a sidebar browser/preview webview — click the main window first.
• The macOS traffic lights are positioned in window points and do not scale; above 125 % the top strip is worth a look.

Verified against DeepSeek Harness 0.2.0-rc.2 on macOS. MIT. Repository: https://github.com/DC-507/dsh-zoom

A native setZoomFactor-based UI scale would avoid all four limitations — I left that as an idea in #8646.