The "Layout Controls" introduce the ability to stretch or compress the diagram width and/or height and also stretch or compress the subnet columns.
The first control "Resource Width" adjusts the width of the canvas.
Hava Layout Adjustment Resource Width
The screenshot above is a standard AWS VPC. The below diagram is the result of adjusting the diagram canvas using the width adjustment.
Hava Layout Resource Width After
This width adjustment results in more distance between resources while keeping the entire environment on screen. This is especially useful when displaying resource names. Just using the zoom option to achieve the same result would scale the diagram so only part of the diagram was visible on screen.
The Resource Height adjustment works in the same manner, increasing the horizontal gap between visualized resources.
Hava Resource Layout Height
The final control is the Subnet Column adjustment. This control allows you to expand or contract the width of the subnet columns without affecting the distance between resources.
On the initial diagram with default settings, the resources in each subnet are stacked based on the available screen space.
Hava Layout Default Subnet Diagram
By increasing the Subnet Column width, you can increase the number of resources visualized on each row within the subnet, while preserving the original spacing between resources. This is especially useful where you have a large number of resources in one subnet.
Hava Layout Increased Subnet Width