Changing the appearance of citations with biblatex

Question

I am using biblatex to add references in slides made with beamer. In following slide I need to make following changes:

1. Remove black line that separates the contents of slide from the ref.
2. Reduce font size of reference.
3. Is is to possible to specify the color in which one wants the ref to appear.

Following is the code for the love slide.

\documentclass{beamer}
\usetheme{default}
\usecolortheme{default}
\usefonttheme{professionalfonts}
\setbeamertemplate{navigation symbols}{}
\setbeamertemplate{caption}[numbered]
\setbeamertemplate{frametitle}[default][center]

\usepackage{verbatim}
\usepackage{tikz}

\usepackage[style=verbose,backend=bibtex]{biblatex}
\bibliography{foo}

\begin{document}
\begin{frame}
\frametitle{\textbf{\color{blue}{Dummy Slide \footfullcite{dumref}}}}
\begin{center}
\framebox{
\begin{tikzpicture}[thick,scale=0.6, every node/.style={transform shape}]
\draw [dashed] (1,12) -- (11,12);
\node[above] at (4,11) {1}; \node[above] at (8,11) {true};
\end{tikzpicture}

}
\end{center}
\end{frame}
\end{document}

Answer 1

The footnote rule can be removed with

\def\footnoterule{}

You can change the font size in footnotes with

\setbeamerfont{footnote}{size=\normalsize}

see How do I change \footnote font size in beamer presentation?.

Three parts of the citation are coloured: name, title and remaining information. The colour can be set independently for all the parts.

\setbeamercolor{bibliography entry author}{fg=red}
\setbeamercolor{bibliography entry title}{fg=green}
\setbeamercolor{bibliography entry note}{fg=blue}

The colour of the footnote marker can be set with

\setbeamercolor{footnote mark}{fg=.}

see Making footnote marks in beamer use the surrounding color. Here it is set to adapt to the surrounding text colour, but you can also choose \setbeamercolor{footnote mark}{fg=pink} or any other color.