Formula:Ms/doc

The template Ms (imported from it:Template:Ms) works in two different ways:

if parameter 1 is a width with units (es. 3em; 20%, 20px), the template opens a div with a style margin-left:[parameter1]. An explicit block end </div> is needed.
if parameter 1 is an integer (into the range 2-13 only), it activates templatestyle code saved in Formula:Ms/style.css; default unit is em; a css code margin-left:[parameter]em will be loaded, only affecting<poem> blocks. No end block code is needed.