ELsMystERy

Easy Taxonomy Support, by <a href="http://spectrumvisions.com" title="Spectrum Visions" rel="nofollow ugc">Spectrum Visions</a>, makes it easy to add post tag and category support to pages and custom post types.
Custom post type support will prevent post tags and categories that are associated with custom posts from returning “nothing found”, or 404 errors. With the page tags and/or categories enabled, you can add tags to pages and assign pages to categories.
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Features
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Add tags and categories to WordPress pages.
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Allows tags on custom post types with the “post_tag” taxonomy to function without producing errors.
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Page tags will show up in your tag cloud.
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Interacts with <a href="https://wordpress.org/plugins/q-and-a-focus-plus-faq/" title="Q & A Focus Plus FAQ" rel="ugc">Q & A Focus Plus FAQ</a> so that tags on FAQs are not broken if Easy Taxonomy Support is deactivated.
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Easy Taxonomy Support does not:
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Add the “post_tag” or any category taxonomies to registered custom post types. Custom post type support only works if you can already add tags to custom posts.
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Display categories or tags at the bottom of pages.
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Clean your house, mow your lawn, or improve your love life. If we can add these features in the future, we will.
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Easy Taxonomy Support

Use post tags and categories with pages and custom post types.

Erick Hitter

Creates dropdown lists of non-hierarchical taxonomies (such as <code>post tags</code>) as an alternative to term (tag) clouds. Multiple widgets can be used, each with its own set of options.
Numerous formatting options are provided, including maximum numbers of terms, term order, truncating of term names, and more.
Using the <code>taxonomy_dropdown_widget()</code> function, users can generate dropdowns for use outside of the included widget.
Only use version 2.2 or higher with WordPress 4.2 and later releases. WordPress 4.2 changed how taxonomy information is stored in the database, which directly impacts this plugin’s include/exclude term functionality.
This plugin was formerly known as the <code>Tag Dropdown Widget</code>. It was completely rewritten for version 2.0.
Follow and contribute to development on GitHub at https://github.com/ethitter/Taxonomy-Dropdown-Widget.

Taxonomy Dropdown Widget

Creates a dropdown list of non-hierarchical taxonomies as an alternative to the term (tag) cloud. Formerly known as Tag Dropdown Widget.

Easy Taxonomy Support vs Taxonomy Dropdown Widget