Logs are records of your past activities. Typically, you create a log when you finish a task. However, you can also create a log independently of any task. Creating a log for each completed task in a project gives you an easy way to review the history of the project.
To view your logs, click on Logs in your project information panel. This makes your logbook visible.
Click on New at the bottom of your logbook. Pick a date for the log in the dialog that pops up. A new log will appear in your logbook.
Select a log from your logbook. Click Delete at the bottom of your logbook. The selected log will disappear from the logbook.
Select a log from your logbook. The log information in the logbook will change to reflect the log you selected. Edit the body of the log as needed.