You CAN reset the current Layer, BUT at least you were warned of your folly ! I made this Plugin which alerts you if you try and reset the current Layer away from the logical default of “Layer0”. There have been requests to take the “active” layer buttons away, or at least to make them less conspicuous. Even though Layer0, which contains all the raw geometry, is set to active and therefore visible, when you turn off the layer of some higher-level containing group or component, all the subordinate objects it contains are also turned off, all the way down to raw geometry. You control the visibility of an entire branch of the model by controlling the layer of the topmost (outermost) group or component that defines the branch. Groups and components can be nested as deeply as you wish–although I prefer a flatter model structure just to make things easier to get at (easier to get into their context so they can edited). That is, the hierarchical array of gozintas (this gozinta that which in turn gozinta that) is built using groups and components. Not only, as Dan said, do groups and components isolate and protect geometry, they are the main structural/organizational tools in SU. Other functions you may have associated with layers in other programs are generally accomplished using groups and components. Layers have a single use in SU: to control visibility. Perhaps to a greater extent than you think. There are plugins available that address this (including one of mine). if you explode a Group, the contents will be placed on the layer that the Group was on, overriding their original layer. Note: due to a peculiarity of explode, hide the Group, don’t put it onto a non-visible layer. When you are finished, unhide the Group and explode it. When part of your model is getting in the way, the best answer is to wrap it in a temporary Group and hide that Group. This nearly always trips up users coming to SketchUp from other CAD tools. When contents are on anything but layer0, confusing interactions of visibility result and the confusion can lead to modeling errors.Īs Dan already stated, the other common confusion is that layers do not isolate geometry. If the contents are on non-visible layers, they remain non-visible. But this override does not work the other way: if you put the container on a visible layer, this does not override the visibility of layers the contents may be on. If you put the container (Group or ComponentInstance) on a non-visible layer, its contents remain on their original layers but are also made non-visible regardless of the visibility of their layers. When things are nested inside Groups or Components, there is a one-way relationship between the way that layer visibility affects them. This is one of the two most common points of confusion about SketchUp layers.
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