Shrink distance between and child distances

Mike raised this 4 years ago and it is a real issue for visual appearance. Please refer to his example.

https://community.mindmanager.com/topic/798-additional-customization-for-parent-child-distances

I am having an issue with the spacing between a default Topic and its subtopics in MindManager 25.

I am trying to create a compact hierarchical map where the parent and its subtopics are positioned closely together. For example:

default Topic
    ├── subtopic
    ├── subtopic
    └── subtopic

The problem is that there is a considerable gap between the default Topic and the first subtopic.

I checked the Format Topic → Subtopics Layout → Spacing settings. The current values are:

Distance from parent:       3.5 mm
Distance between siblings:  1.0 mm

I then reduced Distance from parent to 0.0 mm, expecting the first subtopic to move closer to the default Topic:

default Topic
    |
    |
    ├── subtopic

However, there was no noticeable change in the gap.

I have also tested both Tree and Org Chart layouts, but the same issue remains. This makes me think that the visible gap is not being controlled by the Distance from parent setting.

The layout appears to behave more like this:

default Topic
    |
    |       ← considerable fixed gap
    |
    ⊖
    |
    ├── subtopic
    ├── subtopic
    └── subtopic

I also tested changing the line style, but this did not appear to resolve the spacing issue.

What I am trying to achieve is:

default Topic
    ├── subtopic
    ├── subtopic
    └── subtopic

with the smallest practical distance between the default Topic and the first subtopic.

Could you please advise whether there is another setting that controls this spacing, or whether this may be a limitation or defect in the MindManager 25 layout engine?