A simple pair of settings gives the iPhone Duo more usable room. Set the iPhone Duo text size to 90 percent and Safari page zoom to 85 percent, and more of every screen and website fits at once.
App developer Dylan, who uses the iPhone Duo for productivity, suggests both changes, and they shrink what is on screen so many websites switch to a wider layout. Safari’s cramped outer display layout is 382 CSS pixels wide in portrait, which is why a small zoom change can flip a site from a phone layout to a roomier one.
To clarify: – Set your system text size to 90% (one notch down in Settings) to see some extra content in apps. It won’t change the layout though. – Set your default website zoom to 85%. It will make the size look more natural on the inner screen (default is too large imo) and will enable wide/desktop layouts on a lot of sites.
— Dylan (@DylanMcD8) October 30, 2026
Lower the iPhone Duo text size to 90 percent
The text size setting applies to apps that support Dynamic Type, including Messages, Mail, Notes and Settings. Open Settings, tap Appearance, tap Text Size and drag the slider toward the smaller end. Dylan’s tip is 90 percent, a small step down that frees up a few extra lines per screen.
You can also change it while you are in an app. Add the Text Size control to Control Center, then drag its slider without leaving the screen you are reading.
Set Safari page zoom to 85 percent
In Safari, tap the Page menu on the left side of the search field and choose Page Zoom, then tap Zoom Out until it reads 85 percent. When the iPhone Duo is open, the current percentage shows below Page Zoom, and Actual Size returns the page to 100 percent.
That setting applies to the site you are on. At 85 percent the outer display behaves like a viewport of about 449 CSS pixels (382 divided by 0.85), which is enough for many sites to use a wider layout.
The inner display gains even more from the change. In portrait with one tab open it gives Safari 669 CSS pixels, and 85 percent zoom lifts that to about 787, which is past the 768-pixel tablet breakpoint that many sites use. The outer display in landscape starts at 594 CSS pixels and reaches about 699 at the same zoom, so the tip helps in every pose.
When the tip falls short
Smaller text and zoom make everything harder to read, so it suits people who hold the phone close and want density more than comfort. Some sites ignore zoom and keep fixed layouts, and pages on the outer display are still much narrower than on the inner one.
If pages still look cramped, the free Wider Safari extension lets them run full width, and Brim browser keeps pages clear of the camera. Neither is needed to use the 85 percent zoom, and you can undo it by choosing Actual Size.
