src/components/MarkFormField/index.tsx

@@ -135,7 +135,9 @@ const MarkFormField = ({
               <div className={styles.actionsBottom}>
                 <Button
                   onClick={handleSignAndComplete}
-                  className={styles.submitButton}
+                  className={[styles.submitButton, styles.completeButton].join(
+                    ' '
+                  )}
                   disabled={!isReadyToSign()}
                   autoFocus
                 >

src/components/MarkFormField/style.module.scss

@@ -70,6 +70,11 @@
     margin-top: 10px;
   }
 
+  .completeButton {
+    font-size: 18px;
+    padding: 10px 20px;
+  }
+
   .paginationButton {
     font-size: 12px;
     padding: 5px 10px;