(format=xxx)...(/format) - This tag can set multiple formatting arguments, some as key-value-pair. "xxx" is to be replaced by a string and multiple args must be separated by a comma. Pairs are assigned with "key:pair". Here we have an example: "b,s,color:#f00,inline" (not "bbcode" compatible)
b - makes bold
i - makes italics
u - makes underline s - makes strikethrough
inline - shows the element "inline" not as paragraph
block - shows the element as block (default)
left - put the block to the left
right - put the block to the right
color:xxx - Sets text color. Allowed are names or hexadecimal like "#f00"
bgcolor:xxx - Sets the background color. Values are the same to "color"
size:xxx - Sets font size. Allowed are any values used in css definition (em, px ,pt , % and so on)
width:xxx - Sets the width of the block. Allowed are any values used in css definition (em, px ,pt , % and so on)
class:xxx - Uses a predefined classification located in stylesheet. Must be alone and the prefix for css class is "xf_tp_usercss__".