# Documentation: Description of each layer

**URL:** <https://librepcb.discourse.group/t/documentation-description-of-each-layer/155>\
**Category:** Help\
**Created:** [November 14, 2019, 10:03pm UTC](https://librepcb.discourse.group/t/documentation-description-of-each-layer/155 "2019-11-14T22:03:40Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![Doom](https://avatars.discourse-cdn.com/v4/letter/d/a587f6/32.png) [@Doom](https://librepcb.discourse.group/u/Doom)\
**Post date:** [November 14, 2019, 10:03pm UTC](https://librepcb.discourse.group/t/documentation-description-of-each-layer/155/1 "2019-11-14T22:03:40Z")

</div>

I have noticed that layer “Top Grab Areas” is needed to move top device, which is expected.

But I have also noticed that “Top References” layer should also visible which is not expected by me. So I took a look at the documentation to know what is exactly this layer, but I do not found anything about it.

So where is this information ?

And if you know, is it normal the need of the visibility of these two layers.

D.