// Configure the gridfield filter form to always show
$gridField->visibleFilterForm();

// Set the gridfield to a dense format
$gridField->denseGrid();

// Removes the GridField_ActionMenu and the class 'grid-field__icon-action--hidden-on-hover'
$gridField->unhideActions();

// Add color to a single column in the row
$gridField->coloredColumn('NameOfColomnToColor');

// Add color to a row by the value of a colomn
$gridField->coloredRows('NameOfColomnThatDeterminesRowColor');

// These methods can also be chained together
$gridField
  ->visibleFilterForm()
  ->denseGrid();