The most efficient use of the "tabular" clip is the following. Selecting the following two rows as a block
Igor Podlubny 10
Lubomir Dorcak 20
and running the "tabular" clip instantly gives the result shown below:
%
\begin{tabular}{ll}
Igor Podlubny & 10 \\
Lubomir Dorcak & 20 \\
\end{tabular}
Note that you have to use two or more spaces or tabs for separating columns in your pre-fabricated text; single space is not treated as a column separator. If the table cell must be left empty, use the tilde ("~"), as in the following example, or any other symbol which does not produce printed output in TeX:
Igor Podlubny 10
Lubomir Dorcak ~