[Tex/LaTex] small font of text under table, but keeping table size itself normal

fontsizetables

When making a table in lyx using tex coding (ERT):
I want some explanation text in a small font under the table (using \multicolumn). But when i type {\small [text]} the entire table shrinks, even if I make sure to write the \small -command just before the text that I want to be small.

\begin{tabular}{lccc} 
\multicolumn{4}{l}{Table 1: CPA regulatory costs by risk class} \\ \hline 
Risk class & Freq. inspection & Cost inspection & Freq. system revision \\ \hline
$R_t = 1$ & Each year & 20,200 & Every 3rd year \\
$R_t = 2$ & Every 2nd year & 15,200 & Every 6th year \\
$R_t = 3$ & Every 2nd/3rd year & 11,700 & - \\
$R_t = 4$ & When needed & 4,500 & - \\ \hline
\multicolumn{4}{c}{Source: Lovdata - Forurensningsforskriften} \\
\end{tabular}

I only want the line with \multicolumn{4}{c}{Source: Lovdata - Forurensningsforskriften} to be small.

Best Answer

Is this what you're looking for? 

\documentclass{article}
\begin{document}
\begin{tabular}{lccc} 
\multicolumn{4}{l}{Table 1: CPA regulatory costs by risk class} \\ \hline 
Risk class & Freq. inspection & Cost inspection & Freq. system revision \\ \hline
$R_t = 1$ & Each year & 20,200 & Every 3rd year \\
$R_t = 2$ & Every 2nd year & 15,200 & Every 6th year \\
$R_t = 3$ & Every 2nd/3rd year & 11,700 & - \\
$R_t = 4$ & When needed & 4,500 & - \\ \hline
\multicolumn{4}{c}{\scriptsize Source: Lovdata - Forurensningsforskriften} \\
\end{tabular}
\end{document}

Producing

enter image description here

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