Edit boundary for Hollow core
A new functionality is available in IMPACT Revit for Hollow cores which makes it possible to edit and modify the boundary.
The command is named 'Edit Boundary Hollow core' and it is placed under the drop down menu from Hollow core.

Figure 1 - Edit boundary Hollow core command in IMPACT Revit
When starting the Edit Hollow core boundary and selecting the elements, the program activates the sketch lines that user can select and use for modifying the boundary.

Figure 2 - Sketch lines for modifying the boundary are activated
After modifying the sketch lines with the desired hollow core boundary, user needs to press on 'OK' button from top right corner in Revit so that the new boundary is applied.

Figure 3 - Pressing OK button so that the new hollow core boundary is applied

Figure 4 - New boundary of the Hollow cores