This heading explains the working of tasks or instructions that you have just completed.

You will also find some other learning aids in the book, including:

These are short multiple-choice questions intended to help you test your own understanding.

These set practical challenges and give you ideas for experimenting with what you have learned.

You will also find a number of styles of text that distinguish between different kinds of information. Here are some examples of these styles, and an explanation of their meaning.

Code words in text are shown as follows: "You may notice that we used the Unix command rm to remove the Drush directory rather than the DOS del command."

A block of code is set as follows:

# * Fine Tuning
#
key_buffer = 16M
key_buffer_size = 32M
max_allowed_packet = 16M
thread_stack = 512K
thread_cache_size = 8
max_connections = 300

When we wish to draw your attention to a particular part of a code block, the relevant lines or items are set in bold:

# * Fine Tuning
#
key_buffer = 16M
key_buffer_size = 32M
max_allowed_packet = 16M
thread_stack = 512K
thread_cache_size = 8
max_connections = 300

Any command-line input or output is written as follows:

cd /ProgramData/Propeople
rm -r Drush
git clone --branch master http://git.drupal.org/project/drush.git

Newterms and important words are shown in bold. Words that you see on the screen, in menus or dialog boxes for example, appear in the text like this: "On the Select Destination Location screen, click on Next to accept the default destination."