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This plugin allows your blog to change the font size of entries “on the fly”.
Features:
<ul>
<li>Customizable HTML-wrapper to the style of your theme.</li>
<li>Automatic insertion of the plugin code all pages of posts.</li>
</ul>

Post size text changer

Allow your readers to change the font size of article!

ramon fincken

Lets you override default texts from your admin panel. 
Originally built to override texts from Woocommerce, but also works for all neatly added texts by WordPress Core and plugins. 
 
It will translate all _e(”) or __(”) string calls, so check the PHP sourcecode of the plugin or theme you need to translate. 
 
It will NOT translate any dynamic strings like %s or %d, so “%s has been added to your cart.” is not translatable. 
 
It will NOT translate any strings that contain HTML tags at all. 
 
Some WooCommerce examples: 
WooCommerce “Select option” (dropdown value) setting 
<a href="https://s.w.org/extend/plugins/gettext-override-translations/screenshot-3.png" rel="nofollow ugc">Fullscreen Screenshot 3</a> 
WooCommerce “Select option” (dropdown value) translation result 
<a href="https://s.w.org/extend/plugins/gettext-override-translations/screenshot-4.png" rel="nofollow ugc">Fullscreen Screenshot 4</a> 
WooCommerce “Order notes” setting 
<a href="https://s.w.org/extend/plugins/gettext-override-translations/screenshot-5.png" rel="nofollow ugc">Fullscreen Screenshot 5</a> 
WooCommerce “Order notes” translation result 
<a href="https://s.w.org/extend/plugins/gettext-override-translations/screenshot-6.png" rel="nofollow ugc">Fullscreen Screenshot 6</a>
Coding by: <a href="https://www.mijnpress.nl" rel="nofollow ugc">MijnPress.nl</a> <a href="https://twitter.com/#!/ramonfincken" rel="nofollow ugc">Twitter profile</a> <a href="https://profiles.wordpress.org/ramon-fincken/" rel="nofollow ugc">More plugins</a>

Gettext override translations

GUI in backend to override texts and translations without any programming knowledge.

Post size text changer vs Gettext override translations