How can I find and delete a certain regular expression in the Geany text editor?

I have a sample text like this: \documentclass[a4paper]{article} \usepackage[a4paper,margin=2cm]{geometry} \usepackage[utf8]{inputenc} \usepackage[T1]{fontenc} \usepackage{color} \setlength{\parindent}{0em} \setlength{\parskip}{2ex plus1ex minus0.5ex} \newcommand{\stylea}{\noindent{\textcolor[rgb]{0.9, 0.9, 0.8}{\fcolorbox[rgb]{0, 0, 0}{0.2, 0.2, 0.2}{#1}}}} \begin{document} \ttfamily \setlength{\fboxrule}{0pt} \setlength{\fboxsep}{0pt} 1 \stylea{\# Author{\hspace*{1em}}: Bhishan Poudel} \\ 2 \stylea{\# Date{\hspace*{1em}}{\hspace*{1em}}: May 19, 2016} \\ 3 \stylea{} \\ 4 \stylea{Line wrapping in geany} \\ 5 \stylea{===============================================================================} \\ 6 \stylea{edit > preference > editor > features > line wrapping} \\ 7 \stylea{then,} \\ 8 \stylea{document > line wrapping} \\ \end{document} I want to delete all the words \stylea{ }, keeping the words inside {} intact. I know I can find and replace \stylea{ and replace by whitespace, but I don't even want whitespace and also want to delete the closing brace, }, at the same time. Also can we replace words in only the selected block in Geany? For example, if I select the lines 1 to 8, and replace stylea by styleb?