How to reduce space between lines in a table

Sometimes (horizontal) space is jut too much in a LaTeX table.
In order to decrease it, it is actually possible to give negative values to addlinespce

\begin{tabular}{ll}

   Line1&some text\\

    \addlinespace[-0.3ex]

             Line1&some text\\

\end{tabular}

Original link:
https://tex.stackexchange.com/questions/268508/reduce-the-space-between-two-lines-in-a-latex-table

Ever wondered about how to set the font sizes you want? Here is a picture that explains all \small \tiny \scriptsize \large \huge etc sizes

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