The disable feature offers you the ability to temporarily restrict mobile users from accessing specific levels within your project. This can be particularly useful when certain work has been completed, but additional inspections are required before further action can be taken.
For example: If you don't want any of the levels to be visible in the nomenclature because they are not required at the moment, you can select that level and click on "disable". The level will then not be visible to mobile users while adding nomenclature. Moreover, if later on you feel you want to use the same level, you can select it and enable it.