click '''Tools-->Database Processing-->Calculate Estimated Dates...''' brings up a {{man label|Undo history warning}} window:
{{man warn|Undo history|Proceeding with this tool will erase the undo history for this session. In particular, you will not be able to revert the changes made by this tool or any changes made prior to it. If you think you may want to revert running this tool, please stop here and backup your database.}}
You then choose {{man button|Stop}} or {{man button|Proceed}}.
You will be presented with the {{man label|Calculate Estimated Dates}} window. This window has three tabs.
*Options:
**Filter: in the drop down menu you can select which portion of the database will be processed: you can also select the '''entire database''', '''Descendants''' of the Active Person, '''Descendent families''' of the Active Person, '''Ancestors''' of the Active Person, '''People with common ancestor''' with the Active Person, or any '''custom filter''' (see custom made filters).
**Filter Person: the Active Person is listed in this field, but click on the {{man button|Select a different person}} will bring up a {{man label|Select a person for the report}} window. This window shows a list of people you can choose from. Use the {{man button|down}} arrow or th {{man button|>}} to expand and collapse the nodes. In the table you will see for which persons no birth or death date is available.
In the left hand side lower corner there is a {{man label|Show all}} tick box. Clicking on this button will show all people in the database.
**Source text: in this {{man label|text field}} you can fill in the text that will be used in the source reference. Default value is: ''Calculated Date Estimates''.
Four tick boxes are available:
** Remove previously added dates
** Add estimated birth dates
** Add estimated death dates
** Display detailed results: will show details for every date entered.
*Config:
** Maximum age:
** Maximum sibling age difference:
** Minimum years between generations:
** Average years between generations:
=== Edit Database Owner Information ===
