# Modify distance of enumerate item in tcolorbox

i want to add line (A) and change distance between rows (B)

My code

\documentclass[11pt,a4paper]{article}
\usepackage[utf8]{inputenc}
\usepackage[margin=1in]{geometry}
\usepackage{tcolorbox}
\begin{document}
\begin{tcolorbox}[width=10cm]

\begin{enumerate}
\item
...........:...........     ..............................................\\
........................  \hfill XXX
%\vspace*{1.5cm}
\item
...........:...........     ..............................................\\
........................  \hfill XXX
\end{enumerate}
\end{tcolorbox}

\end{document}


The enumitem package allows the simple specification of various list parameters, including (in this case) itemsep to set the vertical gap between items.

\documentclass[11pt,a4paper]{article}
\usepackage[utf8]{inputenc}
\usepackage[margin=1in]{geometry}
\usepackage{tcolorbox,enumitem}
\newcommand\linegap[1]{\underline{\hspace{#1}}}
\begin{document}
\begin{tcolorbox}[width=10cm]

\begin{enumerate}[itemsep=1.5cm,leftmargin=0pt,itemindent=.5in]
\item
\linegap{35pt}:\linegap{35pt}     \linegap{135pt}\\
\linegap{75pt}  \hfill A
\item
...........:...........     ..............................................\\
........................  \hfill A
\end{enumerate}
\end{tcolorbox}

\end{document}


I can think of various interpretations for what the OP means by the "B" issue. Here is a possibility. In addition to using itemsep, the setspace package is employed to temporarily set the line spacing:

\documentclass[11pt,a4paper]{article}
\usepackage[utf8]{inputenc}
\usepackage[margin=1in]{geometry}
\usepackage{tcolorbox,enumitem,setspace}
\newcommand\linegap[1]{\underline{\hspace{#1}}}
\begin{document}
\begin{tcolorbox}[width=10cm]
\begin{spacing}{2.5}
\begin{enumerate}[itemsep=1.5cm,leftmargin=0pt,itemindent=.5in]
\item
\linegap{35pt}:\linegap{35pt}     \linegap{135pt}\\
\linegap{75pt}  \hfill A
\item
...........:...........     ..............................................\\
........................  \hfill A
\end{enumerate}
\end{spacing}
\end{tcolorbox}

\end{document}


• B.Segietes. Thank for your fast reply. Sorry, I uploading image slow and can you help to change A & B in my uploaded image. – latexforti Mar 20 at 14:16
• @latexforti I have taken care of the "A" issue but with regard to vertical distance "B", is it between the 1st line and what follows? is it between every line? or is it between items? – Steven B. Segletes Mar 20 at 14:22
• (B-green) is between every line. I don't want to use (\\) and tried added \vspace*{0.3cm} but not but not effort. Thanks – latexforti Mar 20 at 14:28
• @latexforti Please see my edit. I use the spacing environment to set temporarily the line spacing. – Steven B. Segletes Mar 20 at 14:36