captionsnumberingtables
I want to change the caption number from 2.1 to 2.3.1 as my section is 2-3. I got try to use \usepackage{chngcntr} and \counterwithin{table}{section} but due to my section title is 2-3. It will label the '2.3.1' that I want as '2-3.1'. Anyone know how to change?
Although your question is closely related to the following question, the numbering scheme you want is different.
The general solution is the same, however:
Use the chngcntr package to determine which counters depend on which. In your case, you want the table counter to depend on the section counter, so you add
\usepackage{chngcntr}
\counterwithin{table}{section}
Do not make changes directly in the \caption argument; instead, you can use \captionsetup locally (inside the environment); unfortunately? (seee below) tiny is not one of the predefined font sizes, but you can easily implement it using \DeclareCaptionFont; an example including some of your general settings for caption:
\documentclass{article}
\usepackage[font=small,labelfont=bf]{caption}
\DeclareCaptionFont{tiny}{\tiny}
\begin{document}
\begin{figure}
\centering
A
\caption{test caption in \texttt{small} font size}
\end{figure}
\begin{figure}
\centering
B
\captionsetup{font=tiny}
\caption{test caption in \texttt{tiny} font size}
\end{figure}
\end{document}
Of course, you can introduce any other font, style, etc. modifications required in \captionsetup.
As a side note, a caption with such small font would be really hard to read.
Best Answer
chngcntris meant to manage counter resetting from continuous to per-unit and vice versa. However, you're interested in adjusting the counter representation. To do so addto your document preamble. The default would be to use
which would inherit the hierarchy associated with the section numbering (also, typically,
\thechapter.\arabic{section}), and pass it on to the table numbering. For what it's worth, this is a good thing, since the numbering style matches across the hierarchy and is consistent.