Allow bulk editing of param1 field
There is currently no way to bulk update (add, change or delete) the Param1 field in the Keyword view. Please add this functionality to work like updating Dest URL, bids, etc. Until then, I'll be selecting them manually and making my changes - big waste of time.
Looks like this is still not possible online. Fortunately it is possible with the Microsoft Advertising Editor app on Windows/MAC now.
In Microsoft Advertising Editor:
1. Go to the keywords of a campaign/ad group
2. CTRL+A to select all keywords
3. Enter a new value in the param1 field at the bottom
4. Upload your changes to your account with the "Post Selected Campaigns" button
Extend this to all three param field values.