Integration with Other Applications > Creo Parametric – Windchill Integration > PDM Actions > Checking Out Objects > Checking Out Objects from Creo Parametric > From the Model Tree
  
From the Model Tree
1. Right-click on the object in the model tree, then select Check Out.
2. The object will be checked out as long as you have the proper permission and it is not checked out by someone else (or yourself in another workspace)