The Layers tab in the sidebar of the Display Window allows for some sophisticated interactive editing of the current plot.

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. The following sections describe the sections of this tab, and how to use them to perform specific tasks.

Description of the levels

The Layers tab is divided into three sections, forming a hierarchy as described below. Understanding this organisation allows for more sophisticated plot editing.

Layer Level

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

View Level

This section shows the icons that are applied to the currently-selected scene (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 Layer Level will take its visdef from here if there is one.

Top 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 Layer Level and does not find one in the View Level will take its visdef from here if there is one.

Changing the layer order and transparency

The Layer Level section contains all the graphical 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 visdefs applied to a particular data item

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 Layer Level section. A tip will appear to confirm which layer it will be applied to. Single or multiple visdef icons can be applied in this way, and will replace any visdefs currently applied to that data.

Visdef icons currently applied to a data item can also be edited directly from here - double-click on the visdef icon, or right-click | Edit in plot, modify the parameters and 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 its data layer.

Changing the visdefs applied to multiple data items in a page/scene

Any visdef icons present in the View Level will be applied to any data items which do not have a visdef directly attached to them. Therefore, first ensure that any data items you want to affect in unison do not have their own visdefs at the Layer Level. Then drop and edit visdef icons in the View Level to affect these items in one go. Icon names with <angular brackets> around them denote the system default visdef; these can be edited, but cannot be saved to disk. If the Display Window contains multiple pages/scenes, check the current selection with the Active Scene control at the top.

Changing the visdefs applied to all pages/scenes in the window (e.g. stamp plots)

Any visdef icons in the Top Level will be applied to any data items which a) don't have their own visdef attached directly to them, and b) do not inherit any visdefs from their View Level. So if a number of pages have been plotted without any visdefs attached to their data, dropping a visdef icon into the Top Level will cause it to be applied to the data in all these pages. Icon names with <angular brackets> around them denote the system default visdef; these can be edited, but cannot be saved to disk.