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Hello,
Following is my code:


\documentclass[manuscript,screen]{acmart}
\usepackage[utf8]{inputenc}
\usepackage[T1]{fontenc}
\usepackage{listings}
\input{solidity-highlighting.tex}
\usepackage[colorinlistoftodos]{todonotes}
\usepackage{rotating}


\usepackage{array, makecell}
\renewcommand ...

Hi,
The description of my table as far as I understand it is given below:

First row is the combination of two rows: First cell of 1st row is empty, 2nd cell of the 1st row is the combination of 5 columns (text=GrpNumber1), 3rd cell of 1st row column is the combination of 4 columns(text=GrpNumber2 ...

Hi,
Thanks a lot. Pleae tell me:


\begin{table}[]???Can't understand the purpose of '[]'
\label{tab:classification}???Can't understand
\vspace{-0.1in}???Can't understand


Please help me to understand the commands: \begin{table}[], \label{tab:classification} and \vspace{-0.1in}.

Zulfi.

Hi,
Following is my code:
\documentclass[manuscript,screen]{acmart}
\usepackage{listings}
\input{solidity-highlighting.tex}
\usepackage[colorinlistoftodos]{todonotes}
\AtBeginDocument{%
\providecommand\BibTeX{{%
\normalfont B\kern-0.5em{\scshape i\kern-0.25em b}\kern-0.8em\TeX}}}


\setcopyright ...