The first thing you will see when opening LayOut is the Welcome Window. The Welcome Window is where you can create new files from templates and continue work on ongoing projects.
Dear Customers,
Trimble Identity has implemented One-Time-Passcodes as the next evolution in account security. Trimble ID sign in now requires a secondary form of verification, a One-Time-Passcode, sent to your primary email.
For more information, see Mandatory One Time Passcode.
Sincerely,
The Trimble team at SketchUp