Save Custom Materials in Sandbox 2

Step One:
Navigate to Sandbox 2's top nav bar and locate the Tools drop down menu as shown below.

Step Two:
Locate the Preferences menu and click on it. It can be found in the following image.



Step Three:
The following menu will pop up after you complete Step Two and you will need to locate and click the menu Source Control. If you find it successfully the image below is what you will see on your screen. Continue to Step Four to complete this tutorial.



Step Four:
Finally you need to click the check box next to Enabled so it reads False and looks the same as the image below. Once you have completed this step click OK to fix your material saving problems.