A histogram visual has the following shelves:
Use a Dimension field from the Data menu to trellis the visual into columns.
This shelf accepts multiple fields.
Use a Dimension field from the Data menu to trellis the visual into rows.
This shelf accepts multiple fields.
Add a Measure field from the Data menu to generate a histogram of its values.
This shelf accepts a single field.
Add Dimension or Measure fields from the Data menu to include or exclude categorical or value criteria.
This shelf accepts multiple fields.