Log Book View
The log book view keeps and displays all your period records.

Adding a new period
Click the "Add" button below the log book. The following interface appears. You must specify a start date (defaults today), estimated bleeding length, and an optional remark.
Note that it is not necessary to specify an end date when adding the current period. Simply leave out the end date, which will be automatically determined when you add the next period.

Editing an existing period
Select one period record from the log book, and click the "Edit" button. An similar interface appears. You may edit the appropriate fields on the interface.
Deleting existing period(s)
Select one or more period records from the log book, and click the "Delete" button. After a confirmation, the select records will be deleted.
To select multiple records, holding the Ctrl key while clicking the records in the log book.
Switching to Calendar view
Simply select the Calendar option on the "view" bar on the top of the log book.
