Right-Click to Create

When you hover over a cell on the calendar it gets highlighted.

Right-click the highlighted cell and select the Create Entry button.

This opens a dialog where you fill in the details:

1. Select a Project and Project Task that the registration will be billed to
2. Write a Description of what you did during those hours
3. Press OK to create the time registration

Tip: This method creates a registration for a single half-hour block. To create longer entries, use the Drag feature instead.