Magento – Magento 2 Admin Grid Add/Update Button

Renate, if you are following the tutorial, then you'll need to add the code suggested by Rama to this section

<?php
class Foo_Bar_Block_Adminhtml_Baz extends Mage_Adminhtml_Block_Widget_Grid_Container
{
    public function __construct()
    {
    // The blockGroup must match the first half of how we call the block, and controller matches the second half
    // ie. foo_bar/adminhtml_baz
        $this->_blockGroup = 'foo_bar';
        $this->_controller = 'adminhtml_baz';
        $this->_headerText = $this->__('Baz');

        parent::__construct();

        // must be placed after the parent::__construct();
        $this->_removeButton('add');
    }
}

protected function _construct()
{
    $this->_addButtonLabel = __('Custom Name'); // to change the add new button value 
    parent::_construct();
    $this->buttonList->remove('add'); //to remove add button
    $this->buttonList->remove('save'); //to remove save button
    $this->buttonList->remove('reset'); //to remove reset button
    $this->buttonList->remove('delete'); // to remove delete button
}