Using the editor below you can easily generate a custom symbol to be used with the PCD8544 library for the Arduino. The output is a sequence of bytes in hexadecimal "C" format that can be pasted into your Arduino source code. Check this example for more information.
You can also paste an already existing byte sequence into the text box and click draw to start from there. This can be useful if you're looking to change the font included with the library, or just want to add accented characters to it.