What does Alt+F11 do?

Excel keyboard shortcuts and function keys - UC Washington Center

F11 Creates a chart of the data in the current range in a separate Chart sheet. Shift+F11 inserts a new worksheet. Alt+F11 opens the Microsoft Visual Basic For Applications Editor, in which you can create a macro by using Visual Basic for Applications (VBA). F12 Displays the Save As dialog box.
Source : https://www.ucdc.edu/sites/default/files/uploads/documents/IS/User%20Docs/Excel%202016%20for%20Windows%20keyboard%20shortcuts.pdf

How do I open a folder on my Android phone?

How to Open File Manager on Android: 9 Steps (with Pictures) - wikiHow

Opening File Manager on Your Phone Open the app drawer on your Android's home screen. To access your files via Settings, tap Storage & USB." When viewing your Android files
Source : https://www.wikihow.com/Open-File-Manager-on-Android

How do I reset my settings back to normal?

How to Reset Android to Factory Default - YouTube

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Source : https://m.youtube.com/watch?v=_xbA-E6rOBc

Why can't I install apps downloaded from Chrome?

Fix problems with apps, extensions, or themes - Chrome Web Store Help

If you can't install an app Make sure you have the latest version of Chrome. Learn how to update Chrome. If you're using a work or school computer, your administrator might not let you install items from the Chrome Web Store. For more help, contact your administrator.
Source : https://support.google.com/chrome_webstore/answer/1698338?hl=en

Why can't I open my files?

Get permission to open a file or folder - Android - Google Docs Editors Help

If you can't open a file, it could be because: You don't have permission. You're signed in to a Google Account that doesn't have access. The correct app isn't installed on your Android device.
Source : https://support.google.com/docs/answer/14743550?hl=en&co=GENIE.Platform%3DAndroid

How do I change the settings to open a file?

Change default programs in Windows - Microsoft Support

On the Start menu, select Settings > Apps > Default apps.Select which default you want to set, and then choose the app. You can also get new apps in Microsoft Store. ... You may want your .pdf files, or email, or music to automatically open using an app other than the one provided by Microsoft.
Source : https://support.microsoft.com/en-us/windows/change-default-programs-in-windows-e5d82cad-17d1-c53b-3505-f10a32e1894d