Alternative for intro in document class knitting patterns class

There is no command in the knittingpattern class to put the image on the left, but you can define a new command to do that.

The intro command three arguments: the ratio of the columns (this is an optional argument with default value 0.25), the text (which is set in a tabular column of type m, which is a paragraph) and the image, which is set using a includegraphics command. The size of the first column is calculated as the textwidth minus the fraction of the textwidth as given in the optional first argument (and a small correction for the column separation).

From the source code of the class:

newcommand{intro}[3][.25]{begin{tabular}{m{textwidth - 4tabcolsep
- #1textwidth}m{#1textwidth}}
#2&fbox{includegraphics[width=#1textwidth]{#3}}
end{tabular}}

For a new command you can switch the columns and the arguments around:

newcommand{introleft}[3][.25]{begin{tabular}{m{#1textwidth}m{textwidth - 4tabcolsep
- #1textwidth}}
fbox{includegraphics[width=#1textwidth]{#2}}&#3
end{tabular}}

Note that the tabular column specifications have switched (the m{#1textwidth} column is now first), the actual columns have also switched (the includegraphics cell is now second) and the order of the arguments has switched (#2 is now the image and #3 is the text).

MWE for this modification, adapted from the package documentation:

documentclass{knittingpattern}

begin{document}

newcommand{introleft}[3][.25]{begin{tabular}{m{#1textwidth}m{textwidth - 4tabcolsep
- #1textwidth}}
fbox{includegraphics[width=#1textwidth]{#2}}&#3
end{tabular}}

introleft{lion.png}{
Introduction introduction introduction introduction introduction
introduction introduction introduction introduction introduction
introduction introduction introduction introduction introduction
introduction introduction introduction introduction introduction
introduction introduction introduction introduction introduction
introduction introduction introduction introduction introduction.
Introduction introduction introduction introduction introduction
introduction introduction introduction introduction introduction
introduction introduction introduction introduction introduction
introduction introduction introduction introduction introduction
introduction introduction introduction introduction introduction
introduction introduction introduction introduction introduction.
Introduction introduction introduction introduction introduction
introduction introduction introduction introduction introduction
introduction introduction introduction introduction introduction
introduction introduction introduction introduction introduction
introduction introduction introduction introduction introduction
introduction introduction introduction introduction introduction.
}

end{document}

Result: