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The Layers tab

The image on the right shows a Metview Display Window with two data fields plotted, each with its own Contouring icon, plus a custom Text Plotting icon for the title. The Layers tab of the sidebar is open. We will use this as an example

We'll look at the Display Level and the View Level sections in a moment, but for now look at the Plot Level section. This contains all the layers of the plot - they can be re-ordered by dragging each layer up or down, or by clicking on the up and down arrows at the bottom. Their transparency level can also be set using the slider at the bottom.

Changing the layer order and transparency

The Plot Level section contains all the elements layers of the plot that - they can either be re-ordered or edited.by dragging each layer up or down, or by clicking on the up and down arrows at the bottom. Their transparency level can also be set using the slider at the bottom.

Changing the visdefs applied to a data layer

Changing the visdefs applied to all data layers in a page/scene

Changing the visdefs applied to all pages/scenes in the window

Inline editing of visual definition icons

Layer t1000 comes from a MARS Retrieval icon called t1000. When the layer tree is expanded we see the data icon plus the visdef icon (shade) that has been applied to it. If we want to change the contouring parameters for this layer, we can edit the shade icon directly in the plot by double-clicking on it (or right-click | Edit in plot). The icon editor for this visdef appears; when you click Ok, the changes are applied immediately to the plot. Your changes will not be saved back to the original visdef icon until you choose Save to disk from the context menu for that visdef. From the context menu you can also remove the visdef from that its data layer.

Targeting icon drops

Normally, when a visdef icon is dropped into a Display Window, it is applied to all data layers for which it is valid. If you want to apply a visdef to just one data layer, you can drop it onto that specific layer in the Layers tab. A tip will appear to confirm which layer it will be applied to. This works also when dropping Single or multiple visdef icons onto a layercan be applied in this way.

Levels

The Layers tab is divided into three levels, described below. Understanding these levels allows for more sophisticated plot editing.

The Plot Level

This is where the actual plotting layers are shown for the currently-selected view (page). They can be re-ordered, removed, and their visdefs edited.

The View Level

This section shows the icons that are applied to the currently-selected view (page) and are not specific to any particular data layer. Any data layer which does not have a visdef attached directly to it in the Plot Level will take its visdef from here if there is one.

The Display Level

This section shows the icons that are applied to the all the views (pages) and are not specific to any particular view or data layer. Any data layer which does not have a visdef attached directly to it in the Plot Level and does not find one in the View Level will take its visdef from here if there is one.