Ever wondered how do you use high ASCII characters such as £, ¢, ¥,. ° (degree) on your document or presentation. I wanted to use those special characters in one of my presentations. In Windows, I've used Character map utility. Strangely, on Linux I have never encountered a situation where I need to use these characters (IOW, I might have been too lazy and had used just words).
gnome-character-map utility allows you to copy those characters. Fire up your gnome-character-map utility, select the character you want to use, double click the character so that it appears on the "Text to Copy" text box, Copy and paste it where you wanted. It's so simple!