To Delete Facets Using a Block

Select the Delete Mesh Facet tool ( Modeling > Mesh > Modify Meshes ).
Select Block.
Select a mesh element.
The mesh element highlights.
Select a first corner point for the block.
Select a second corner point for the block.
Do one of the following:

Enter a data point to delete the selected facets.

or
Right-click to deselect the facets.

or
<Ctrl + click> to create a second block and then enter a data point to delete the selected facets.