If these key combinations do not work for the @ sign, you have probably changed the key assignment.
No special character is used as often as the @ sign, colloquially also called “spider monkey”. Usually only an integral part of an email address, the “@” is also suitable for directly addressing someone in a chat or email with several addressees. With the key combination “Alt Gr” + “Q” the sign is quickly set.
However, if this combination no longer works, there can be several reasons. The most common reason is that you accidentally activated the English or American key assignment on your keyboard. Then you will find A @ using the key combination “Shift” + “2”, whereby you do not have to use the numeric keypad here, but the number series under the F keys. Alternatively, “Shift” + “a” also works.
Windows 10: The most important hotkeys and shortcuts
To switch the keyboard back to German, go to the properties of the keyboard in the Control Panel and change the input method accordingly. In most cases, the key combination “Shift” + “Alt” also works. See also: Change keyboard language at the push of a button
By the way: In France and Belgium you can elicit a @ from local keyboards using the key combination “Alt Gr” + “0” (zero)! And an Apple PC produces a spider monkey if you press one of the two “Alt” keys simultaneously with the letter “L”.
Here is an overview of the most important countries and shortcuts for the @ sign:
“Alt Gr” + “0”: Africa and Arab countries (French speaking), Belgium (French speaking), France
“Alt Gr” + “2”: Belgium, Brazil, Denmark, Finland, Canada, Netherlands, Norway, Portugal, Sweden, Switzerland, Spain
“Alt Gr” + “q”: Iceland, South America (Spanish speaking), Turkey
“Alt Gr” + “v”: Croatia, Serbia, Slovenia²
“Alt Gr” + “ò” (key above the point): Italy
“Shift” + “2”: Africa and Arab countries, Greece, USA
“Shift” + “ä” (or key above the right shift key): Great Britain