Lines are not enough
A plain line can show proximity, but it does not explain meaning. In a lesson, a research board, or a project plan, the important question is often whether one idea proves, enables, depends on, or leads to another.
Meaning stays attached
Canvio relations have labels, relationship types, colors, and editable endpoints. Routing responds to the objects around it so the connection can remain readable as the board changes.
The same interaction works across notes, shapes, frames, maps, and other living objects. That makes relations part of the workspace language rather than a special diagram mode.
A calmer visual system
The goal is not to put more lines on a board. It is to make the important connections easier to follow, especially when the board is being taught, reviewed, or shared with someone new.