Some characters are not on the keyboard—for example, the copyright character (©). To type these letters in Vim, you use digraphs, where two characters represent one.
To enter a ©, for example, you hold CTRL key and press K, and then type Co.
To find out the entire list of digraphs that are available, use the following command:
or the shorter version of the command:
You will see a list of command like the following screen shot:
For instance, in the list,
A' Á 193 means that if you want to type
Á symbol, you
1. hold CTRL key and press K
2. and then type
3. you will get Á
4. 193 is just the character number for your reference.
Hope this helps! :)