How do I stop an app from opening new windows behind the one I am using?

Start by checking whether the window is open but behind another one. That is safer and more useful than immediately changing system settings.

On Windows, press Windows key+Tab to see an overview of open windows and desktops, then select the window you want. Alt+Tab also switches among open windows. [S1]

On Mac, Control-Down Arrow shows windows belonging to the app in front. Command-Grave Accent switches among windows of the app you are using, while Command-Tab switches between open apps. [S2]

If you find the missing window, bring it forward and note which app it belongs to. Those shortcuts help locate and activate existing windows; they do not guarantee that the next window will appear in front.

The cited Windows and Mac guidance explains how to find or switch to open windows, but it does not establish a general setting that forces every newly opened window to the front. [S1] [S2] The behavior may depend on the particular app and what you were doing when the window appeared, so avoid assuming that one system-wide switch will fix it.

Check the app’s own preferences or help pages for options clearly related to windows, tabs, opening behavior, or notifications. Read what an option changes before enabling it. Do not turn off security, confirmation, or permission prompts just to make a window appear sooner; suppressing them may not solve the focus problem.

If there is no clearly relevant, documented option, use the window-switching shortcut as a workaround and contact the app’s support with a concise description.

Keep a short, neutral record so you can distinguish a hidden window from a notification or a separate app opening. You do not need to include private message contents or account information. Note:

1. The app name and, if readily available, its version.
2. What you were doing immediately before you noticed the issue.
3. Whether the new item is a window, tab, dialog, or notification, if you can tell.
4. Which window-switching shortcut revealed it, and whether it belonged to the same app.
5. Any relevant setting you checked and its exact label.

For example, a hypothetical note could read: “App: [app name]. After I selected [general action], a second window was open behind the window I was using. On [Windows or Mac], [shortcut] revealed it. I checked [preference name]; I did not change prompt or security settings.” This describes what you observed without claiming a cause.

Use this sequence:

1. When it happens, check open windows with the shortcut for your operating system and bring the relevant window forward.
2. Identify whether it belongs to the same app, another app, or is a notification rather than a window.
3. Repeat the check once during the same kind of task, if convenient, and record what you observed. Avoid treating one occurrence as proof of the cause.
4. Look only for a clearly relevant preference in the app’s own settings or help. If its effect is unclear, leave it unchanged and ask the app’s support team.
5. If reporting it, share the brief observation note and the steps that made the window visible. Do not include passwords, private message contents, or other unnecessary sensitive details.

The available guidance establishes ways to locate and activate windows on Windows and Mac, not a universal prevention switch or a fix for a specific app. If the shortcuts differ on your device or the window remains inaccessible, consult the operating system or app’s official help for that device and app.