\centering. \includegraphics[width=1.0\linewidth,height=0.5\textheight]{}. \caption ... You can set the width or height of the figure and let LaTeX scale the other ... In this code the picture will be adjusted to the width of half of text horizontal space.
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latex-center-figure-horizontally
Your code seems fine, I just added a [width=50mm] in your include graphics and it centered the Figure. I would check two issues: Is your figure .... Space between Rows: \def\arraystretch{1.5}. Horizontal Alignmenti (requires package array). p{width} % equivalent to \parbox[t]{width} m{width} % centered .... center alignment example. latex). 939c2ea5af