添加图片后出现空白区域

Question

添加图片后，我有一个空白区域。如何减少它？我用了\FloatBarrier。但没有用。

% Following copied by Marc van Dongen from comment from OP.
\documentclass[12pt,a4paper,oneside]{report}
   \usepackage{fancyhdr}
   \usepackage{graphicx}
   \usepackage{placeins}
   \begin{document}
   \FloatBarrier
   \subsection{ddd}
      \begin{figure}[ht]
         \begin{center}
            \includegraphics[width=9cm,height=5.5cm]{sss.jpg}
         \end{center}
         \begin{center}
            \caption[ddd ]{ ddd }
         \end{center}
      \end{figure}
      \FloatBarrier
      In English, the word datum is still used in the general
       sense of "an item given".
      In cartography, geography, nuclear magnetic
\end{document}

Answer 1

除了使用Werner 的答案之外，您还可以使用序言中的（例如）\centering控制标题下方的空间，或者使用浮动下方文本中的负数（例如）手动调整特定空间。\belowcaptionskip\belowcaptionskip-1em\vspace\vspace{-1cm}

然而，为了获得优雅的格式，只需使用\centering。

Answer 2

您应该避免使用center环境来对齐内容。具体来说，使用\centering以下方式在浮动环境中居中内容figure：

\documentclass[12pt,a4paper,oneside]{report}
\usepackage{graphicx}
\begin{document}
\subsection{ddd}
\begin{figure}[ht]
  \begin{center}
    \includegraphics[width=9cm,height=5.5cm]{example-image-a}
  \end{center}
  \begin{center}
    \caption[ddd ]{ ddd }
  \end{center}
\end{figure}
In English, the word datum is still used in the general
 sense of ``an item given.''
In cartography, geography, nuclear magnetic.

\newpage

\subsection{ddd}
\begin{figure}[ht]
  \centering
  \includegraphics[width=9cm,height=5.5cm]{example-image-a}
  \caption[ddd ]{ ddd }
\end{figure}
In English, the word datum is still used in the general
 sense of ``an item given.''
In cartography, geography, nuclear magnetic.
\end{document}

看我应该使用center或\centering来制作图表和表格吗？。