Set the Edges Invisible [Feature-not-yet-supported] We have a mesh using the mirror modifier. How could we set the central edges (yellow arrow indicators pointing at) used for mirroring invisible during working on the mesh? Like in Lightwave or Nevercenter Silo 2.

The left is the original model, and the right is the wanted symmetrical line hidden model:



This keeps the model looks neater when working on central parts of the model, like the nose:
You need to apply the Mirror modifier, with merge and clip enabled, then in Edit mode Alt + Right mouse button click on one of the edges to select loop, then  X and select Dissolve Edges from the pop up menu.