When a block is edited in such a way that it no longer fits with one of the standard block forms (Extruded, Sloped wall, Pitched roof or Dome), it is labelled by DesignBuilder with the 5-General block form.
Blocks having the General block form can still be transformed back to have the Sloped wall or Pitched roof form (but not the Extruded form) on the Block tab of the Model options dialog.
Note: General form blocks are automatically configured so that the external walls are not shown on the Edit screen when at block level. This can help when drawing partitions, positioning assembly blocks etc. The option can be reversed using the Display external walls Block display model option if required.