When creating, submityou can use custom template. To use custom template, you need to use the FormHelper::inputc method 'type' => 'submit'instead of the method FormHelper::submit.
(submitContainer), ( form-actions, div CakePHP 3):
$after = $this->Html->link(__('Cancel'),
['admin' => true, 'action' => 'index'],
['class' => 'btn btn-large']
);
$this->Form->input (__('Save'), [
'type' => 'submit',
'class' => 'btn btn-large btn-primary btn-save',
'data-loading-text' => 'Please Wait...',
'templates' => [
'submitContainer' => '<div class="submit form-actions">{{content}}'.$after.'</div>'
]
]);
(, inputContainer), (CakePHP 3.1. 6) submitContainer ( , , FormHelper, , submit ).