LaTeX/C3/newenvironment-in-LaTeX/English-timed

Time	Narration
00:01	Welcome to the spoken tutorial on creating new environments in LaTeX.
00:08	This tutorial will help the learners to create or define new environments to get customized output.
00:15	redefine the existing environments.
00:18	To follow this tutorial, You should have knowledge of commands that are necessary to create a document in LaTeX.
00:24	You should also have knowledge of compiling and producing a PDF output in LaTeX.
00:30	If not, please go through the relevant LaTeX spoken tutorials on this website.
00:37	To record this tutorial, I am using Ubuntu Linux 14.04 operating system, TeXWorks 0.5
00:47	Just like new commands, we can define new environments.
00:51	As the name suggests the command newenvironment is used to create/define a new environment.
00:58	It is used to format blocks of text, generally.
01:04	New environment is a variation of executing few existing commands put together in a sequence.
01:10	Ensure that the custom environment you create, is not an already existing LaTeX environment.
01:18	The syntax to define a new environment is backslash newenvironment environment name within curly braces start commands within curly braces end commands within curly braces
01:32	Here the start commands are executed whenever the environment starts.
01:37	And end commands are executed whenever the environment ends.
01:42	Let us open the TeXWorks editor.
01:48	Pause the tutorial at this point.
01:50	Download and unzip the files provided in the Code Files link below the player.
01:57	You will see some LaTeX code given in the file newEnv.tex
02:06	We will copy and paste the first block of code from this file into our newly opened tex file.
02:27	Let’s try to understand the program.
02:30	Here \newenvironment{bluetext} means that we are defining a new environment called bluetext.
02:39	Here in the definition we center the text and colour it with blue using {\begin{center}\color{blue}} {\end{center}}
02:51	While using it, we just give \begin{bluetext} and \end{bluetext} with the intended text between the two.
03:04	Save the file as newEnv.tex
03:15	Let us compile and see the output.
03:19	Observe the blue text in the output.
03:29	Now, we will see how to use parameters in the environments.
03:36	New environment with parameter is defined as backslash newenvironment environment name within curly braces parameters in square bracket start commands within curly braces end commands within curly braces.
03:56	Let’s open a new file in TeXWorks.
04:03	Now switch to our downloaded code file.
04:16	We will copy the next block of code from our downloaded code file
04:26	and paste it into our new teX file.
04:32	Let us understand the code now.
04:34	Here in the given code, we are adding a title to the blue text by getting the title as an input parameter.
04:45	We have just added textbf textit hash 1 slash slash 12pt to the code given for the environment without parameter
05:01	We use it as “ begin bluetext My text in blue ” and the text, and then “\end{bluetext}”
05:18	Save the file as newEnvp1.tex
05:31	Now compile and see the output.
05:44	We shall see the renewenvironment now.
05:51	renewenvironment is used to change or overwrite the existing environment.
05:56	The syntax for renewenvironment is backslash renewenvironment environment name within curly braces start commands within curly braces end commands within curly braces
06:12	It’s quite similar to newenvironment.
06:16	Once again, we will open a new tex file.
06:28	We will copy and paste the last block of code from our downloaded file
06:48	into our newly opened tex file.
06:53	Let us understand the code.
06:59	renewenvironment itemize redefines the itemize environment.
07:06	It is defined as begin center large end center
07:12	This means that the text should be centered and made to large size.
07:18	Recall that the itemize environment creates a list according to the original definition.
07:24	Let’s see the usage.
07:27	The text given within \begin{itemize} and \end{itemize} should be converted to large size and centered according to our definition
07:42	Let us save the file as renewEnv.tex and compile the tex file.
07:59	Observe the output.
08:08	To summarise, we have learnt newenvironment, newenvironment with parameters, renewenvironment
08:21	Create an environment itemizecolor, which takes the color (red, blue, yellow, green) as input and creates a list in that color.
08:38	The video at the following link summarises the Spoken Tutorial project. Please watch it.
08:46	The Spoken Tutorial Project Team : Conducts workshops using spoken tutorials and Gives certificates to those who pass an online test
08:56	For more details, please write to us.
09:00	Spoken Tutorial Project is funded by NMEICT, MHRD, Government of India. More information on this Mission is available at this link.
09:11	This is Ambika Vanchinathan signing off. Thanks for joining.

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