A Log Work form or window is displayed when:
In the Worklog Calendar Time View you can create worklogs in 15m intervals by clicking on the canvas grid and drag it towards the end time. Hovering over the grid shows start time of worklog. To log work on the issue you need the Work On Issues permissions in the issues relevant project.
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In addition to the fields shown, all fields configured as Tempo Work Attributes are displayed in the form. The Billed field is displayed in the log work form if Billed Hours is configured on your instance.
Log Work dialog in Worklog Calendar Time View - click to enlarge
To log work:
You can click on a Worklog Card in the Calendar to edit it.
You cannot Move or Split worklogs from the Log Work dialog.
To delete a worklog from the Calendar view: