[[Image:fdtd_lec1_3_newproject.png|500px|center]]
Before you begin to set up the geometry of your project, letâs quickly ensure that the project units are set up correctly. First, open up the Units Dialog box by selecting the <b>Units</b> button of the Simulate Toolbar (or using the keyboard shortcut <b>Ctrl+U</b>). Make sure the length units are Millimeters, and select <b>OK</b> to continue. Similarly, for frequency and bandwidth, select the <b>Frequency</b> [[Image:fdtd_frequencybfdtd_frequencyb2.png]] button of the Simulate Toolbar (or use the keyboard shortcut <b>Ctrl+F</b>) to open the Frequency Dialog box. Make sure both the frequency and bandwidth are 1GHz, and select OK to continue.
[[Image:Fdtd_lec1_2a_unitsfrequency.png|center]]