YnAMP works on scripts, not map files, so you can't do that (add only a few things using the WB), if you want to create your own map in civ6 map format, you'll have to put every start position (and NW) on it.
To add or edit something simple to a ynamp map, see the corresponding threads in this subforum.
I've not written the tutorial to import/export a complete map in ynamp script format, but it's complex.
To add or edit something simple to a ynamp map, see the corresponding threads in this subforum.
I've not written the tutorial to import/export a complete map in ynamp script format, but it's complex.