How can I increase / decrease the lines (leading) between lines of text in Windows Live Mail on Windows 8.1?

Previously I was using Thunderbird but because of update compatibility with Windows I have had to switch to Live Mail.

One of the features I miss is the text formatting in HTML, inserting images into text and formatting text as in character and spacing control but most immediate problem I have is adjusting the space between lines of text. (typographers speak of leading)

I understand that everyone may not be able to receive accurately positioned and formatted text and hope this will eventually be added, maybe as a plug in.

(Moved from windows 8.1)