Background package - Troubles with `\NoBgThispage` command

Question

I am not able to make this command be deterministic. The weird behaviour I get with PDFLaTeX is explained in the comments of the following MWE. I checked for conflicts with package afterpage, also maybe via multicol, in my original document and after reading the warning in background's documentation, but it didn't help. What can I do?

\documentclass[oneside,a4paper]{book}%
\usepackage[utf8]{inputenc}
\usepackage{lipsum}
\usepackage[pages=all]{background}
\backgroundsetup{opacity=0.7,contents={\Huge MY BACKGROUND}}
\begin{document}
\thispagestyle{plain}%

%
\BgThispage{}\BgThispage{}\BgThispage{} %Shorthand to enhance opacity just here.
TITLE-PAGE
\clearpage\thispagestyle{empty}
\NoBgThispage{}
\thispagestyle{empty}
A first BgLess page.
\clearpage\thispagestyle{empty}
%\NoBgThispage{} %THIS COMMAND WILL MAKE ALL THE FOLLOWING PAGES MISS THE BACKGROUND.
\textbf{No BG here, please, but yes afterwards. Shouldn't it be as easy as in the previous page?}
\clearpage\thispagestyle{empty}
%\BgThispage% Even this command will be bypassed.
\clearpage
%\NoBgThispage{} %Again, this will affect every remaining page.
TOC page.
\clearpage%
\lipsum[1-10]
\vfill{}Why is BG missing here?
\end{document}

well the implementation is faulty. If you issue \NoBgThispage twice you loose the background. — Ulrike Fischer, May 17 '23 at 21:47
I misunderstood your comment. I guess you mean the command itself is just a workaround to omit the background and it can only be used once in the whole document. Right? :( — Andrestand, May 18 '23 at 14:09

score 0 · Answer 1 · answered May 18 '23 at 14:35

After @Ulrike Fischer's comment and this answer: https://tex.stackexchange.com/a/210105/36389 a possible workaround for both enhancing opacity in specific pages and also omitting the background in others is to consider changing the background setup after \begin{document}. In this case, I defined 3 commands to hold different common setups along the document:

\documentclass[oneside,a4paper]{book}%
\usepackage[utf8]{inputenc}
\usepackage{lipsum}
\usepackage[pages=all]{background}
\newcommand{\TitlePageBgOpacity}{0.95}
\newcommand{\NormalPageBgOpacity}{0.5}
\newcommand{\NoBgPageBgOpacity}{0}
\backgroundsetup{contents={\Huge MY BACKGROUND}}
\begin{document}
\thispagestyle{plain}%

%
\backgroundsetup{opacity=\TitlePageBgOpacity}
TITLE-PAGE
\clearpage\thispagestyle{empty}
\backgroundsetup{opacity=\NoBgPageBgOpacity}
\thispagestyle{empty}
A first BgLess page.
\clearpage\thispagestyle{empty}
%\backgroundsetup{opacity=\NoBgPageBgOpacity}
\textbf{No BG here, please, but yes afterwards. Shouldn't it be as easy as in the previous page?}
\clearpage\thispagestyle{empty}
\backgroundsetup{opacity=\NormalPageBgOpacity}
\clearpage
\backgroundsetup{opacity=\NoBgPageBgOpacity}
TOC page.
\clearpage%
\backgroundsetup{opacity=\NormalPageBgOpacity}
\lipsum[1-10]
\vfill{}Why is BG missing here?
\end{document}

Background package - Troubles with `\NoBgThispage` command

1 Answers1