When the search type Text and Pulsing is used?

When the search type Text and Pulsing is used?

When i use it on windows for verifying a button it says Search Type “Text&Pulsing” can’t be used for this image – no searchable pixels

The “pulsing” search type will remove all but the darkest pixels. So if you use it on a button that is mostly grey it will probably cause that effect.

If your Button is NOT pulsing then you should probably use the Text search type (or Tolerant if it’s just an image button).