How to recover the tagging options for an area after splitting that area?
Several question have been asked about this in the past ( [1][1], [2][2], [3][3] ), and all answers have been at best dubious and at worst completely mistaken.
The problem is that iD, for some unfathomable reason, refuses to offer tags for areas if the feature was not started as an area or has had its "area-type" tags removed. This usually occurs when splitting areas (because you tend to delete the relations that iD create before you tag the new areas) or because any area of significant complexity or size is usually more convenient to create using the line tool. Once the line os closed and you try to tag it, you will be unable to search for the area tag settings (such settings, such as natural, landuse or building tag settings). settings. iD simply will never offer them up.
If you have such a closed line that you need to tag using area tags, the only solution (if they can even figure that out) is usually to select an arbitrary tag (you can't even manually type a tag to a new feature *because iD forces you to use a preset for a new feature*!) an then go in an manually set an area tag.
***Is there a simpler solution to apply area tags in such a situation?***
[1]: https://help.openstreetmap.org/questions/27591/how-to-combine-several-lines-to-an-area-with-editor-id
[2]: https://help.openstreetmap.org/questions/27594/can-you-change-a-closed-line-into-an-area
[3]: https://help.openstreetmap.org/questions/25707/area-creation-in-id-continuous-addition-of-points-drops-how-to-continue