Checking out multiple Project nodes from a folder and sub folders

1	Click File > Version Control > Check Out Multiple.

2	In the Check Out dialog box, select the folder that contains the Project nodes you want to check out.

3	Select Show all descendants.

4	Select the Project nodes you want to check out (use SHIFT SELECT or CONTROL SELECT to select multiple nodes).

5	Specify the Check-out method and click OK.

Reference

Check Out dialog box