How can I control the visiblity of elements from not coming out in preview view

[Aidan28610574w1n9]

Please see below a refrenence to a master template page I want to reference in indesign, to use as a master page:

At the moment I have only set up the grids but I dont know how to set my coloured elements so that they do not show up in my preview/ final view. Is there any setting or override I can use to do this? Thanks

[jmlevy]

You can put them on a non printable layer:

Untick the checkbox. You will notice that the layer is now displayed in italics, indicating that it won't print.