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Font + window size (OSC 7777)
ESC ] 7777 ; font ; size BELOSC 7777 sets both the font size and window size in a single zoom operation. The sequence is
ESC ] 7777 ; font ; size BEL, where the font and size parameters control mintty's combined zoom behavior — adjusting the window dimensions to keep the visible character grid stable while the font changes. This is a mintty-specific zoom control that complements OSC 7770 (font size only). Like other mintty font extensions, it has no adoption outside mintty.How this is testedpartial
Send
Send
OSC 7777 ; ; BEL (default zoom) and verify the terminal consumes the sequence (cursor position unchanged).The same probe runs against headless backends (via Termless) and real terminal apps (via a daemon launched in each terminal). This lets us distinguish parser correctness from rendering correctness.
Analysis2026-04-06
Supported by all 4 tested terminals — universal adoption. Part of the Rich TUI baseline.
Supported by 6 of 14 backends (43%)
Terminal Applications
| Terminal | Version | Support | Notes |
|---|---|---|---|
| iTerm2 | 3.6.9 | ✓ yes | |
| Ghostty | 1.3.1 | ✓ yes | |
| Terminal.app | 2.15 | ✓ yes | |
| Kitty | 0.46.2 | ✓ yes | |
| VS Code | 1.113.0 | ? unknown | |
| Warp | 0.2026.03.18.08.24.03 | ? unknown | |
| Cursor | 2.6.21 | ? unknown |