--- title: "Announcing new builds for 21 August 2026" url: https://daily.dev/posts/announcing-new-builds-for-21-august-2026-lxqvkwgv8 source_url: https://blogs.windows.com/windows-insider/2026/08/21/announcing-new-builds-for-21-august-2026 type: article source: "Windows Blogs" published: 2026-08-21T17:12:28.234Z updated: 2026-08-21T17:16:32.184Z tags: ["windows", "accessibility", "winui"] reading_time: 2 upvotes: 0 comments: 0 language: en --- > ## Documentation Index > Fetch the complete documentation index at: https://daily.dev/llms.txt > Use this file to discover all available pages before exploring further. # Announcing new builds for 21 August 2026 **[Windows Blogs](https://daily.dev/sources/windows)** · 2 min read · 0 upvotes · 0 comments ## Summary New Windows 11 Insider Preview builds are rolling out to the Beta (26220.9223) and Experimental (26340.9233, and 28120.2738 for 26H1) channels. A bug that caused the Experimental Feature Flags list to appear empty has been fixed. Notable new features include a modernized, WinUI-rebuilt AutoPlay dialog with dark mode support and notification center integration (Experimental channel), and a new accessibility setting called 'Open apps maximized' that automatically maximizes app windows on open (Experimental and Beta channels). ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: ## Questions this post answers ### What is new in Windows 11 Insider Preview build 26340.9233 for the Experimental channel? Build 26340.9233 introduces a modernized AutoPlay dialog rebuilt with WinUI, offering dark mode support, better responsiveness to text scaling and display settings, and notifications docked in the notification center. It also fixes a bug that caused the Feature Flags list to appear empty for Experimental channel Insiders, and adds a new 'Open apps maximized' accessibility setting. _daily.dev keeps developers tracking Windows Insider build changes before they land in stable releases._ ### How do I make apps open maximized automatically in Windows 11? Enable the new 'Open apps maximized' accessibility setting found under Settings > Accessibility > Visual effects, available in the Experimental and Beta Insider Preview channels (builds 26340.9233 and 26220.9223). Once turned on, Windows automatically maximizes app windows as they open, useful for screen reader users, magnification users, tablet mode, or anyone preferring a full-screen workspace. _developers testing accessibility features can follow Windows Insider changes like this on daily.dev._ ## Similar posts on daily.dev - [Announcing new builds for 22 May 2026](https://daily.dev/posts/announcing-new-builds-for-22-may-2026-6kepat3yr) · Windows Blogs · 1 upvotes · 0 comments - [Announcing new builds 8 June 2026](https://daily.dev/posts/announcing-new-builds-8-june-2026-kydd3xefw) · Windows Blogs · 0 upvotes · 0 comments --- Tags: [#windows](https://daily.dev/tags/windows), [#accessibility](https://daily.dev/tags/accessibility), [#winui](https://daily.dev/tags/winui) [View this post on daily.dev](https://daily.dev/posts/announcing-new-builds-for-21-august-2026-lxqvkwgv8)