Change font of text after pressing button


Enter text as input and how do you change the font of text after pressing button? 

Press B, I or U as shown in the picture

Use Text Editor from Forge.

Here's some sample:

I know CKEditor is free, don't know about Froala Editor though...

This forum itself is using Froala Editor.

Try typing some replies, then select the words, then press Ctrl-B (bold).