Issue #3053261 by Pancho: Visually improve FillPdfFormFieldForm

src/Entity/FillPdfFormField.php

@@ -78,7 +78,7 @@ class FillPdfFormField extends ContentEntityBase implements FillPdfFormFieldInte
 
     $fields['value'] = BaseFieldDefinition::create('string_long')
       ->setLabel(t('Fill pattern'))
-      ->setDescription(t('Text and tokens with which to fill in the PDF.'))
+      ->setDescription(t('Text and tokens with which to fill in the PDF. This field supports tokens.'))
       ->setDisplayOptions('form', [
         'type' => 'string_long',
         'weight' => 0,

src/Form/FillPdfFormFieldForm.php

@@ -49,7 +49,17 @@ class FillPdfFormFieldForm extends ContentEntityForm {
   public function form(array $form, FormStateInterface $form_state) {
     $form = parent::form($form, $form_state);
 
-    $form['token_help'] = $this->adminFormHelper->getAdminTokenForm();
+    $form['prefix']['widget']['0']['value']['#rows'] = 3;
+
+    $form['value']['token_help'] = $this->adminFormHelper->getAdminTokenForm();
+
+    $form['suffix']['widget']['0']['value']['#rows'] = 3;
+
+    $form['extra'] = [
+      '#type' => 'details',
+      '#title' => $this->t('Transform values'),
+    ];
+    $form['replacements']['#group'] = 'extra';
 
     return $form;
   }