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English:
This plugin to select blocks of code takes advantage of JavaScript-library ‘google-code-prettify’. If it is for his work simply insert frame <pre> tag with class ‘prettyprint’.
*** Tip: In order to optimize the use of resources, try to use only one option – ‘Automatically replace the tags <pre> to <pre class=”prettyprint linenums”> before saving post.’
Russian:
Данный плагин для выделения блоков кода использует возможности JavaScript-библиотеки ‘google-code-prettify’. При это для его работы достаточно просто обрамлять вставки тегом <pre> с классом ‘prettyprint’.
***Совет: в целях оптимизации потребления ресурсов старайтесь использовать только 1 флажок – ‘Автоматически заменять <pre> на <pre class=”prettyprint linenums”> перед сохранением записи.’

Code Prettify Syntax Highlighter

Highlighting the code in the post with JavaScript library «google-code-prettify».

sigalitam

Just highlight is a WordPress plugin for highlighting text in your posts or pages, and easily create beautiful posts that highlight what really matters to your readers.
How to use? 
* Select the sentence you want to highlight with the cursor. 
* Click the Just Highlight button at the top of the post editor. 
* Save the post. 
* View the post and be amazed from the animation of the highlight as you scroll down the post.
You can also: 
* Choose the text highlight background color. 
* Choose the highlight speed animation (Slow, Normal, Fast, Very Fast). 
* Choose YES / NO to activate or disable the highlight animation.

Just Highlight

Just highlight - Select the text you would like to highlight, click the highlight button and save the post.

Code Prettify Syntax Highlighter vs Just Highlight