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How to render text, formulas, pictures, and more transparently in LaTeX 📂Writing

How to render text, formulas, pictures, and more transparently in LaTeX

Code

The part wrapped in \phantom{} is rendered transparently. It remains transparent while still occupying its original place. If the original text is as follows,

Using \phantom results in the following.

The full code is as follows.

\documentclass{article}
\usepackage{graphicx} 
\usepackage{amsmath}
\usepackage{kotex}

\begin{document}

Let $f$ be defined \phantom{(and real-valued) on $[a, b ]$}. For any $x \in [a, b]$ form the quotient
$$
\phi(t) = \dfrac{f(t) - f(x)}{t - x} \qquad  (a < t < b, t \ne x)
$$
and define
$$
\phantom{f'(x) = \lim\limits_{t \to x} \phi(t).}
$$
If $f'$ is defined at a point $x$, we say that $f$ is differentiable at $x$.

\begin{figure}[h]
    \centering
    \phantom{\includegraphics[width = 0.5\textwidth]{27115bd78040156f6c7d92f41e036a0d28567ec9.jpg}}
\end{figure}
햇살이 창문을 통해 방 안으로 부드럽게 스며들었다. \phantom{커피 향이 공기 중에 퍼지며 일상에 작은 위안을 주었다.} 밖에서는 가벼운 바람이 나뭇잎을 스치며 속삭이는 소리를 남겼다.

\end{document}