Thank you for your post. I would like some clarification so I understand what you’re requesting, do you want a placemark to be dropped every “x” distance or time?
Or do you want the ability to quickly just tap on the placemark icon and it will just drop a point at that location without having you to submit information and fill out the fields? For example, you could have the Placemark information “pre-filled” for 10 different placemarks and the next 10 placemarks will drop in a specific order and you just need to tap on the Placemark icon to drop it.
Unfortunately, both of those aren’t possible within the app yet, let me know what you would like to see and I can file a feature request for you.