Setting Revit to Open in a Maximized Window – WikiHelp

“You can force Revit to always open in a maximized window by using the following steps:

1. Locate the Windows shortcut Icon you use to launch Revit.
2. Right-click on the Icon, and choose Properties
3. In the Shortcut Tab in Properties, change the Run: dropdown menu from Normal Window to Maximized.
4. Click OK to exit the dialog”

From
Setting Revit to Open in a Maximized Window – WikiHelp: