MacworldSome people use their Macs to drive enormous HDTVs, letting them access a wide range of audio and video apps on a Mac and streaming video services while also retaining the security of the Mac operating system. However, its easy to run into a problem: the interface elements on the external display can wind up so small that you have a hard time making them out.You have a few ways to improve this situation, though readers have found that not all work in their circumstances.Set the display size to Default or Larger TextIn > System Settings > Displays with your large display selected, the default settings shown have a Use as section with at least four choices. Larger Text and Default cause macOS to act as if the display is lower resolution relative to the typeface and interface element used.However, whats rendered on the screen, like typefaces, images, and video, continues to use the devices native resolution. This is often the easiest and best solutionif it works for your display.Set your display to show larger text sizes using standard options in Displays.You can choose among a greater range of sizes and demonstrate the effect of higher-resolution rendering to yourself by clicking the Advanced button in Displays and then enabling Show resolutions as list. This reveals all resolutions for which the native display density is retained even as the size of interface elements changes.If you enable Show all resolutions, you will see some resolutions show with (low resolution) after them. If you select one of those and compare it to the same option without the label, you can see how the rendering differsthe jaggies are quite obvious at low resolution.You can see all resolutions, including ones that render at a lower resolution than the displays true capability.Work with Accessibility settingsIn System Settings > Accessibility > Display under the Text and Pointer sections, you can adjust the size of type systemwide, increase the menu bars size, and make the pointer easy to see or spot (when jiggled). Not all apps support the Text size setting, but its likely youre using only a fewor just the TV and Safari appswith your external display.Accessibility options may help with legible text and pointer sizes on a large external display.Turn to a third-party app, BetterDisplay ProMany readers suggestBetterDisplay Proas a more complete set of options for scaling the Macs user interface elements relative to the size of the display without causing other issues. This utility lets you unlock high-definition rendering (HiDPI) when the display doesnt meet Apples more restrictive set of resolutions for which it lets you set bigger user interface elements.The developers wikihas a detailed pageon how to customize this feature. However, it mostly involves installing the app, turning on Edit the system configuration of this display model and Enable flexible scaling and then clicking Apply for the display you want to control.Using BetterDisplay Pro, you can tune the way in which user interface and display resolution interact.BetterDisplay has a free and a Pro version; the Pro version is required to unlock the HiDPI feature. However, the developer offers a 14-day free trial, which allows you to test whether the option solves your problem. To keep using it, the cost is $19.99 or 19.99, depending on your region.This Mac 911 article is in response to a question submitted by Macworld reader Andy.Ask Mac 911Weve compiled a list of the questions we get asked most frequently, along with answers and links to columns:read our super FAQto see if your question is covered. If not, were always looking for new problems to solve! Email yours tomac911@macworld.com, including screen captures as appropriate and whether you want your full name used. Not every question will be answered; we dont reply to emails, and we cannot provide direct troubleshooting advice.