You can control window transparency primarily through your operating system's accessibility settings and, in some cases, by restarting the Windows Explorer process. Here's how:
Adjusting Transparency Effects in Windows
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Access Accessibility Settings: Press the Windows key + I to open the Settings app. Navigate to "Accessibility."
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Locate Visual Effects: Within Accessibility settings, find and select "Visual effects."
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Toggle Transparency Effects: Look for the "Transparency effects" option and toggle the switch to the Off position to disable transparency. Turning it On enables transparency.
Restarting Windows Explorer
Sometimes, changes to transparency settings don't take effect immediately. Restarting Windows Explorer can help.
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Open Task Manager: Press Ctrl + Shift + Esc to open Task Manager.
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Locate Windows Explorer: In the "Processes" tab, find "Windows Explorer." (In Windows 11, it will be under the "Details" or "Processes" tab.)
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Restart Windows Explorer: Right-click on "Windows Explorer" and select "Restart." This will restart the graphical shell of Windows and apply the transparency settings. Note that it might close any open explorer windows, so save any work first.
These steps should allow you to effectively control the transparency of windows on your system.