How to use the ifsym package?

Question

I have added \usepackage{ifsym} in the front, and LaTeX cannot parse the command \Letter. What should I do to fix this?

Answer 1

By default the package only sets up the command \textifsymbol and a couple of font selection commonds, such as \textifsym, which will produce LCD type digits and certain chemistry related symbols. To get the Letter icon you can write \textifsymbol{0}. Of course that is not convenient. In order to use the more meaningful command names, you need to load the package with one of its options:

• clock - provides \showclock and different clock symbols
• weather - weather symbols \Sun, \Rain,...
• misc - includes the \Letter icon you are after
• alpine - map symbols for alpine regions e.g. \Hut, \Summit,...
• geometry - circles, squares, diamonds,...
• electronic - digital signals

So as cgnieder says \usepackage[misc]{ifsym} will provide the \Letter command.

Answer 2

And if you want to add more than one you have to write, for example:

\usepackage[misc,clock,geometry]{ifsym}

in the [ ] include the sub-packages that you want... (You have the options above...:-) )