BlocksToolkit How do you work with this item of settings?

[kumik]

Hello. I found a description. Only I do not understand what is regulated using this setting.

http://ai2.appinventor.mit.edu/reference/components/userinterface.html

[RamNaresh]

Tool available to use with, and you can control your tool box, what elements you can have

Keep it All

[ABG]

This setting is mostly used in downloaded project templates for tutorials, where the instructor tries to force the student to see only the components types used in that example.

Students run into trouble if they go on to the next Project without resetting this.