Text Formatting ⇒ beamer | Overlays and Position of Text

[latexhelp1]

I am trying to create a slide in beamer that has four overlays. There are four sections to the slide. On each overlay, each subsequent section of the slide appears and along with additional information about it. The additional information then disappears on the subsequent overlay but the main information remains.

My question is for the information from the first overlay. How can I ensure that it appears int he same spot each time? It might not by default simply based on the amount of text in the overlay. Beamer then adjusts the spacing.

I'm attaching an example. I pray that the code is a minimum working example. The compiled .pdf is also attached.

The line "Bullet 1: text" I want to appear in the same spot in each overlay. I'm just taking a guess and doing trial by error to set the spacing. Is there a way though that I wouldn't need to do trial by error?

Code: Select all

\documentclass[professionalfont]{beamer}
\mode<presentation>
\usetheme{CambridgeUS}
\useoutertheme{miniframes}

\beamertemplatenavigationsymbolsempty

\begin{document}

\section{Section 1}
\subsection{}

\frame
{
\frametitle{Slide Title}
\only<1>{
\vspace{-2.6cm}
\textbf{Bullet 1:} text
\begin{itemize}
\item Clarification
\end{itemize}
}

\only<2>{
\vspace{-1.1cm}
Bullet 1: text

\vspace{0.65cm}
\textbf{Bullet 2:} text
\begin{itemize}
\item Clarification1
\item Clarification2
\item Clarification3
\end{itemize}
}

\only<3>{
\vspace{-0.7cm}
Bullet 1: text

\vspace{0.65cm}
Bullet 2: text

\vspace{0.65cm}
\textbf{Bullet 3:} text
\begin{itemize}
\vspace{0.05cm}
\item Clarification1
\item Clarification2
\end{itemize}
}

\only<4>{
Bullet 1: text

\pause
\vspace{0.65cm}
Bullet 2: text

\pause
\vspace{0.65cm}
Bullet 3: text

\pause
\vspace{0.65cm}
\textbf{Bullet 4:} text
\begin{itemize}
\item Clarification1
\item Clarification2
\end{itemize}
}
}

\end{document}

I would very much appreciate any help that you can provide.