A PDF makes an easy bimble for typing any symbol

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For Windows. Click on download link to pdf at upper right. The usual symbols, and a LOT of weird ones.
from WIKI:

3 Ways to Type Symbols Using the ALT Key - wikiHow

In Windows, Alt key combined with numeric codes can access characters that aren't readily available on a normal keyboard. While Alt codes don't exist on Mac computers, there are a variety of Option key shortcuts that can let you type the...

www.wikihow.com

 

[Andy from Sandy]

♥ This should have been °C.

I use Alt+0176 for the degree symbol.

Alt Codes List of Alt Key Codes Symbols

www.alt-codes.net

I think it might be dependant on which character set is loaded or in force in the window you are typing into.