You can find the Show / hide function at the default Daikin Tab and in the contextual ribbon of Daikin (see article about contextual Ribbon) and has following icons.
The ‘Show’ / ’Hide’ functionality shows or hides the ‘Clearance Zone’ and the ‘Zone Neighbour Unit’ of the objects.
The ‘Clearance Zone’ represents the needed operation space of the units (example of needed operation space: the unit must be placed 20 cm from the ceiling and the wall).
The ‘Zone Neighbour Unit’ represents the minimal placing space between two units.
These commands help the designer to place the elements at the correct location.
See this article to find out the functionallity of the Show/Hide Logo button.
When no Daikin objects are selected, the command does the execution on all Daikin objects in the project. When you have some Daikin elements in selection before execution of the tool, it only process the elements in selection.