Board Thread:Level Sharing and Reviewing/@comment-29904938-20160722133839/@comment-27383731-20160804032430

1. Select a block

2. Click 'Edit Group'

3. Click 'Group Parent'

4. Select the rest of the objects u want to turn into a custom object

5. In the Build tab, go into the far right drop down thing

6. Press the + button

Just saying 2 and 3 are optional, they just make it easier to use the custom object