Splitting zone ... do not split zone

Is it true ...
I create one U-shaped zone - about 450m2.
I split it to three parts ( I even can name those like zones ).
( If I (try to) create three different zones separately then all of those three zones will combine to one zone. )
Later, I have someway to 'modify' 'one-end-zone'... to make it smaller.
Any zone cannot modify smaller - of course, I could try to add no-go-areas
(but there are challenges ... eg how to mark 'box' or 'line' 10cm from original zone border - I try to protect MOVA's wheels).
Is it true that one-end-zone cannot delete? Application give that kind of note.
Do that mean ... I've to delete whole original zone to ... modify that one-end-zone?

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Hello, regarding your question, the situation is as follows:

1. If it's a region separated from the app, deletion is not supported.

2. You can only adjust it by adding restricted areas, etc.; you cannot directly delete or shrink it. However, you can add new regions.

Hello there!
Thank you very much for your feedback. Regarding the zone editing issues you mentioned, here are the clarifications:
Sub-zones split from the main area cannot be deleted individually: Once a sub-zone is split from the main map in the app, it cannot be directly deleted.
Adjustment instructions: You can adjust the mowing range by adding forbidden zones, but you cannot directly delete or shrink an existing sub-zone. You are, however, able to add new, independent mowing zones as needed.
Suggestion for major changes: If you need to significantly modify the boundary of a specific area, the only way to do so currently is to delete the entire original main zone and redraw the boundary.
If you encounter any issues while adding forbidden zones or recreating the map, please feel free to contact us anytime!

Hello!
Sorry, we cannot fully understand the details of your issue. Please provide relevant pictures or screenshots so we can figure out the situation and assist you properly. Thank you for your cooperation.

I tried to add a screenshot and a photo.
There were a ~25cm gap between wall and lawn. I create a map (~450m2). MOVA works well.
After I added those bricks near wall.
Now, MOVAs wheels slides to those bricks. Bricks and lawn are in same level.
It's a challenge to add no-gone-area/line, which works well ( only few long grasses left ).
I've tried to add no-gone-area/line many times.
No-gone-are/line have to be inside that zone. Now, there have to left a lot of gap from bricks.
I could do this smoother, if I could modify (make it smaller) only this zone ( one zone from the whole map ) ...
but it seems to be impossible! If this needs to solve by creating whole 450m2 area - it's a huge task.
There are a lot of other no-gone-areas and other settings. The whole area is about 600m2.
It would be solve this, if the whole map could turn about two degrees
(as now, I've to do same turning to each zone).
I cannot turn my house.