设置文本位置时出现问题

Question

\centering
\begin{tikzpicture}
\node (image) 
{\includegraphics[width=.9\textwidth]{imag/pic1.png}
};
\node
[
    fill=teal,
    align=r north west,
    text=white,
    font={}
] at (pic1.r north west) {Sum is here};
\end{tikzpicture}
\end{frame}  

我正在将文本（Sum is here）移动到图像的左侧。我尝试过右西，左北。但文本没有移动。我该怎么做？

Answer 1

以下是一种方法：

• 请注意所有节点位置均参考其中心
• 第一：双锚
• 第 2 + 第 3：在极坐标中指定锚点

\documentclass[10pt,border=3mm,tikz]{standalone}
\usepackage{graphicx}

\begin{document}
 \begin{tikzpicture}
    \node (A) at (0,0) {\includegraphics{example-image-a}};
    \node[anchor=east,draw=blue!30] at (A.north west) {Sum is here};
    \node[anchor=east,draw=blue!30] at (A.160) {Sum is here};
    \node[anchor=east,draw=blue!30] at (A.180) {Sum is here};
 \end{tikzpicture}
\end{document}