Generation filters present varying depths of detail in the chart. By default, all generations are shown. Generation filters are mutually exclusive; only one can be selected at a time. The Show the last generation option displays data for only the last (most detailed) generation visible in the grid.
For example, the Year dimension contains four quarters, and each quarter can be drilled down to months. Drilling on Q1 with Show the last generation option selected, Q1 is drilled to months and only the lowest generation (months) appears in the chart. The other quarters are not displayed, although they remain in the grid.
To show the last generation in a chart:
When you click the Apply button the changes are implemented but the dialog box remains open.