Fix docs

cpdfmanual.tex

@@ -5234,7 +5234,7 @@ $cpdf -print-struct-tree out.pdf
 StructTreeRoot
 └── P (1)\end{verbatim}
 
-\noindent To prevent such automatic tagging, relying only on manual tags, use \texttt{-no-auto-tags}. The effect may be reversed at any point with \texttt{-auto-tags}. Unless told otherwise, Cpdf auto-tags text as paragraphs P, and images as Figure.
+\noindent To prevent such automatic tagging, relying only on manual tags, use \texttt{-no-auto-tags}. The effect may be reversed at any point with \texttt{-auto-tags}. Unless told otherwise, Cpdf auto-tags text added using \texttt{-text}, \texttt{-stext} and \texttt{-paras} as P, and images as Figure.
 
 There are two types of tag we can add manually. One kind is used to tag individual pieces of content. We do this with a \texttt{-tag}/\texttt{-end-tag} pair. Note that nesting is not permitted here. For example, let us tag a heading:
 
@@ -5299,7 +5299,7 @@ Some tags require a namespace other than the default. You can set the namespace
 
 Extra information may be added to structure tree nodes with \texttt{-eltinfo} / \texttt{-end-eltinfo}. For example, to set the alternative description for an image, we might write \texttt{-eltinfo "Alt=A large horse" -image A -end-eltinfo}. Multiple items may be set at once, for example Alt, ActualText, Lang etc. 
 
-A role map may be set with \texttt{-rolemap}. For example \texttt{-rolemap "/S1/H1/S2/H2"} would map the S1 structure type to the standard type H1 and so on.
+A role map, which maps non-standard structure types to standard ones, may be set with \texttt{-rolemap}. For example \texttt{-rolemap "/S1/H1/S2/H2"} would map the S1 structure type to the standard type H1 and so on.
 
 \fi%End htlatex hack