Go to the Metadata Search App and click on Metadate Search Tab.
- Search your results using the field's toggle ON feature, enter the keyword in the search box, and hit the search button
- Now check the result here, you'll see the Help Text column where you can see Help Text if is there any help text is available.
- Using the download button, you can download files in PDF and CSV format.
- A downloaded CSV file will look like the below image.
- A downloaded PDF file will look like the below image.
PS: View Metadata Search, Salesforce quick search app on Salesforce AppExchange: https://appexchange.salesforce.com/appxListingDetail?listingId=a0N30000009wgF7EAI