在 beamer 中以 2-1 布局创建 3 个块

Question

是否可以在 beamer 中以如下图所示的分布在单个帧中创建 3 个块？块必须具有相同的宽度，并且块 C 应居中。

-----   -----
| A |   | B |
-----   -----
    -----
    | C |
    -----

Answer 1

一种方法是借助一些盒子。

1. 在框架内，首先添加一个带有Ctrl+的 ERT L，然后在其中写入内容\centering。

2. 执行插入-->盒子-->无框。

3. 右键单击框的“标题”，然后单击设置. 将宽度设置为例如列宽的 40%。

4. 通过选择，在此框内添加一个块堵塞从样式下拉菜单中。

5. 将光标放在框的外面，然后重复步骤 2-4。（或者您可以简单地复制粘贴第一个带有块的框。）

6. （可选）将光标放在两个框之间，然后使用插入 --> 格式 --> 水平空间添加一些水平空间。使用水平填充将会把两个块推到边缘。

7. 将光标放在第二个框后面并点击Enter。可选择添加一些垂直空间。

8. 重复步骤 2-4（或复制/粘贴其他框之一）以添加带有块的第三个框。

在 LyX 和 PDF 中，其显示效果如下：

这是.lyx文件本身。（复制代码，粘贴到文本编辑器中，另存为something.lyx。）

#LyX 2.1 created this file. For more info see http://www.lyx.org/
\lyxformat 474
\begin_document
\begin_header
\textclass beamer
\begin_preamble
\usetheme{Boadilla}
\end_preamble
\use_default_options true
\maintain_unincluded_children false
\language english
\language_package default
\inputencoding auto
\fontencoding global
\font_roman default
\font_sans default
\font_typewriter default
\font_math auto
\font_default_family default
\use_non_tex_fonts false
\font_sc false
\font_osf false
\font_sf_scale 100
\font_tt_scale 100
\graphics default
\default_output_format default
\output_sync 1
\bibtex_command default
\index_command default
\paperfontsize default
\spacing single
\use_hyperref false
\papersize default
\use_geometry true
\use_package amsmath 1
\use_package amssymb 1
\use_package cancel 0
\use_package esint 1
\use_package mathdots 1
\use_package mathtools 0
\use_package mhchem 1
\use_package stackrel 0
\use_package stmaryrd 0
\use_package undertilde 0
\cite_engine basic
\cite_engine_type default
\biblio_style plain
\use_bibtopic false
\use_indices false
\paperorientation portrait
\suppress_date false
\justification true
\use_refstyle 1
\index Index
\shortcut idx
\color #008000
\end_index
\secnumdepth 3
\tocdepth 3
\paragraph_separation indent
\paragraph_indentation default
\quotes_language english
\papercolumns 1
\papersides 1
\paperpagestyle default
\tracking_changes false
\output_changes false
\html_math_output 0
\html_css_as_file 0
\html_be_strict false
\end_header

\begin_body

\begin_layout Frame

\end_layout

\begin_layout Frame
\begin_inset ERT
status open

\begin_layout Plain Layout


\backslash
centering
\end_layout

\end_inset


\end_layout

\begin_layout Frame

\end_layout

\begin_layout Frame

\end_layout

\begin_layout Frame

\end_layout

\begin_layout Frame

\end_layout

\begin_layout Frame

\end_layout

\begin_layout Frame
\begin_inset Box Frameless
position "t"
hor_pos "c"
has_inner_box 1
inner_pos "t"
use_parbox 0
use_makebox 0
width "40col%"
special "none"
height "1in"
height_special "totalheight"
status open

\begin_layout Block
\begin_inset Argument 2
status open

\begin_layout Plain Layout
First block
\end_layout

\end_inset


\end_layout

\begin_layout Block
Block 1 content
\end_layout

\end_inset


\begin_inset space \hfill{}
\end_inset


\begin_inset Box Frameless
position "t"
hor_pos "c"
has_inner_box 1
inner_pos "t"
use_parbox 0
use_makebox 0
width "40col%"
special "none"
height "1in"
height_special "totalheight"
status open

\begin_layout Block
\begin_inset Argument 2
status open

\begin_layout Plain Layout
Second block
\end_layout

\end_inset


\end_layout

\begin_layout Block
Block 2 content
\end_layout

\end_inset


\end_layout

\begin_layout Frame
\begin_inset VSpace 0.5cm
\end_inset


\end_layout

\begin_layout Frame
\begin_inset Box Frameless
position "t"
hor_pos "c"
has_inner_box 1
inner_pos "t"
use_parbox 0
use_makebox 0
width "40col%"
special "none"
height "1in"
height_special "totalheight"
status open

\begin_layout Block
\begin_inset Argument 2
status open

\begin_layout Plain Layout
First block
\end_layout

\end_inset


\end_layout

\begin_layout Block
Block 1 content
\end_layout

\end_inset


\end_layout

\end_body
\end_document

Answer 2

和tcolorbox

\documentclass{beamer}
\usepackage[most]{tcolorbox}

\newtcolorbox{myblock}[1]{beamer, width=.475\linewidth,title=#1,on line}

\begin{document}
\begin{frame}

\begin{myblock}{First block}
Some text
\end{myblock}\hfill
\begin{myblock}{Second block}
Some text
\end{myblock}
\bigskip
{\par\centering
\begin{myblock}{Third block}
Some text
\end{myblock}
\par}
\end{frame}
\end{document}

带有minipages和beamer块。

\documentclass{beamer}
\usetheme{Boadilla}

\begin{document}
\begin{frame}

\begin{minipage}[t]{.45\linewidth}
\begin{block}{First block}
Some text
\end{block}
\end{minipage}\hfill
\begin{minipage}[t]{.45\linewidth}
\begin{block}{Second block}
Some text
\end{block}
\end{minipage}
\bigskip
{\par\centering
\begin{minipage}[t]{.45\linewidth}
\begin{block}{Third block}
Some text
\end{block}
\end{minipage}
\par}

\end{frame}
\end{document}

beamerboxesrounded使用 beamer 的盒子和可以获得类似的结果columns。

\documentclass{beamer}
\usetheme{Boadilla}

\begin{document}
\begin{frame}

\begin{columns}[onlytextwidth]
\column{.45\linewidth}
\begin{beamerboxesrounded}[width=\linewidth,shadow]{First block}
Some text
\end{beamerboxesrounded}%
\column{.45\linewidth}
\begin{beamerboxesrounded}[width=\linewidth,shadow]{Second block}
Some text
\end{beamerboxesrounded}
\end{columns}
\bigskip
\begin{columns}[onlytextwidth]
\column{.275\linewidth}
\column{.45\linewidth}
\begin{beamerboxesrounded}[width=\linewidth,shadow]{Third block}
Some text
\end{beamerboxesrounded}
\column{.275\linewidth}
\end{columns}
\end{frame}
\end{document}