Adjusting left/right margins of a wrapfig

Question

Is there a (simple) way to adjust the white space to the left or right of a wrapfigure? I'd like to reduce the whitespace on the left side of a right-floated figure.

Adding \hspace moves the figure to the left, it doesn't move the caption:

\begin{wrapfigure}{r}[.25in]{.98in}
\vspace{-20pt}
\hspace{-.25in}
   \centering
        \includegraphics[width=.98in]{figure.pdf}
   \caption{Caption}
    \label{fig:looping}
 \vspace{-6pt}
 \end{wrapfigure}

Answer 1

The horizontal gap between the contents of the wrapfig environment and the surrounding paragraph text is \columnsep (from the wrapfig documentation, section 2 Sizing and optional overhang, p 3):

LaTeX will wrap surrounding text around the figure, leaving a gap of \intextsep at the top and bottom, and \columsep at the side, by producing a series of shortened text lines beside the figure. The indentation (shortening) of the text is the figure width plus \columnsep minus overhang (if any; see below).

Here's an example that shows the difference when setting \columnsep to 0pt, and leaving it as-is:

\documentclass{article}
\usepackage{wrapfig,graphicx,lipsum}% http://ctan.org/pkg/{wrapfig,graphicx,lipsum}
\begin{document}
\begingroup
\setlength{\columnsep}{0pt}%
\begin{wrapfigure}{r}{.98in}
  \centering\includegraphics[width=\linewidth]{example-image-a}
  \caption{Caption}\label{fig:looping1}
\end{wrapfigure}
\lipsum[1]
\endgroup

\begin{wrapfigure}{r}{.98in}
  \centering\includegraphics[width=\linewidth]{example-image-a}
  \caption{Caption}\label{fig:looping2}
\end{wrapfigure}
\lipsum[1]
\end{document}

Adjust this to your liking. Use scoping (\begingroup...\endgroup, or similar) to localize any changes.

Note that you can therefore also use \intextsep as your vertical adjustment, rather than fixed values.