mce_buttons_3

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Filters the third-row list of TinyMCE buttons (Visual tab).

apply_filters( 'mce_buttons_3', array $mce_buttons_3, string $editor_id )

$mce_buttons_3: (array) Third-row list of buttons.
$editor_id: (string) Unique editor identifier, e.g. 'content'. Accepts 'classic-block' when called from block editor's Classic block.

Changelog
Version	Description
3.3.0	The `$editor_id` parameter was added.
2.0.0	Introduced.