I have three glossaries in my LaTeX file.
Abkürzungsverzeichnis (abbreviation glossary) - that is a chapter in appendix, I use this code to generate my abbreviation glossary:
\chapter{Abkürzungsverzeichnis} \begin{acronym}[Bash] \acro{aPaaS}{Application Platform as a Service} \end{acronym}Abbildungsverzeichnis (figure glossary) - here I use
\listoffiguresLiteraturverzeichnis (bibliography) - here I use
\bibliography{file}{}
And this is what I've got in my table of contents:

I don't like the 'A', so I have removed it with
\setcounter{chapter}{-1}
\chapter{Abkürzungsverzeichnis}
Do you have any ideas how I can remove the free space before 'Abkürzungsverzeichnis'? Thanks in advance!

\addchap{Abkürzungsverzeichnis}? – moewe Jul 23 '17 at 10:31\addchap, but I can't check if it works). If we have an MWE we can also check that our suggestions really work for your setup. – moewe Jul 23 '17 at 10:31\addchap{Abkürzungsverzeichnis}works perfect! Exactly what I wanted, thanks. – Misa Jul 23 '17 at 10:34