I want to show three items to evaluate the features of each one and then select one of them, so I need to show all of them first and then I need that two of them disappear, or at list become transparent. How can I do that?
Edit: (by Sigur)
Those answers were really helpful, but I have 3 items with several subitems in 3 columns. The method number 2 works with the subitems, but when I try to use it with the items, the tex has errors (missing } or \endgroup)
.
This is the code:
\begin{frame}
\frametitle{\LARGE{TITLE}}
% \vspace{4pt}
\begin{itemize}
\leftmarginii=0.8\leftmargini\relax
\begin{columns}[t]
\column{0.3\textwidth}
\item<1> Item1:
\begin{itemize}
\justifying
\vspace{4pt}
\item<1> \footnotesize{Subitem1}
\item<1> \footnotesize{Subitem2}
\end{itemize}
\column{0.3\textwidth}
\item<1-2> Item2:
\begin{itemize}
\justifying
\vspace{4pt}
\item<1-2> \footnotesize{Subitem1}
\item<1-2> \footnotesize{Subitem2}
\end{itemize}
\column{0.3\textwidth}
\item<1> Item3:
\begin{itemize}
\justifying
\vspace{4pt}
\item<1> \footnotesize{Subitem1}
\item<1> \footnotesize{Subitem2}
\end{itemize}
\end{columns}
\end{itemize}
\end{frame}
The new code:
\begin{frame}
\frametitle{\LARGE{Title}}
Antena para recepción APT
\noindent%
\begin{minipage}[t]{.27\textwidth}
\begin{itemize}
%\leftmarginii=0.8\leftmargini\relax
\item<1> Antena Yagi:
\begin{itemize}
%\justifying
\vspace{4pt}
\item<1>[\color{red}\ding{55}] \footnotesize{Requiere un sistema de seguimiento por ser directiva.}
\item<1>[\color{verde}\ding{51}] \footnotesize{Ganancia alta ($>$10 dB). Incrementable si se añaden más elementos.}
\item<1>[\color{red}{\ding{55}}] \footnotesize{Polarización lineal.}
\item<1>[\color{red}{\ding{55}}] \footnotesize{Gran tamaño y carga al viento.}
\end{itemize}
\end{itemize}
\end{minipage}
\begin{minipage}[t]{.29\textwidth}
\begin{itemize}
%\leftmarginii=0.8\leftmargini\relax
\item<1-2> Antena QHA:
\begin{itemize}
%\justifying
\vspace{4pt}
\item<1-2>[\color{verde}\ding{51}] \footnotesize{No se necesita un sistema de seguimiento al ser poco directiva.}
\item<1-2>[\color{red}{\ding{55}}] \footnotesize{Ganancia baja ($<$5 dB).}
\item<1-2>[\color{verde}\ding{51}] \footnotesize{Polarización circular.}
\item<1-2>[\color{verde}\ding{51}] \footnotesize{Anchura reducida.}
\end{itemize}
\end{itemize}
\end{minipage}
\begin{minipage}[t]{.29\textwidth}
\begin{itemize}
%\leftmarginii=0.8\leftmargini\relax
\item<1> Antena DCA:
\begin{itemize}
%\justifying
\vspace{4pt}
\item<1>[\color{verde}\ding{51}] \footnotesize{No se necesita un sistema de seguimiento al ser poco directiva.}
\item<1>[\color{red}{\ding{55}}] \footnotesize{Ganancia baja (Entre 4 y 6 dB).}
\end{itemize}
\end{itemize}
\end{minipage}
\end{frame}
Best Answer
Just specify the slides on which you want things to appear.
Method 1: Relative Overlay Specifications
+
increments the overlay count whichbeamer
uses to track things..
specifies the current slide.n-m
specifies a range i.e. slidesn
tom
inclusive.n
andm
can be numbers (absolute specifications e.g. slide1
or slide3
) or variations on the+
,.
etc. (relative specifications e.g. this slide.
or the next slide+
).+(n)
tellsbeamer
to increment the count and addn
.n
may be negative or positive.So the above increments the count, putting the first item on slide
1
(as opposed to0
which would not be shown); shows the second item from the current slide which is now1
to the next slide2
; and finally shows the third item on slide1
(because the+
increments the number to3
but the(-2)
decreases it by 2 and 3-2=1
).Method 2: Absolute Overlay Specifications
For simple cases, it is often easier to just tell
beamer
which slides to use directly rather than worrying about relative specifications. For example, the following is equivalent to the above:Transparency
If you would prefer to show the covered items as transparent simply add
to your preamble. For example: