What's new 2021-04 c.f. issue #7484

content/getting-started/download-and-install/_index.md

@@ -21,6 +21,8 @@ Octave plugins, ABAQUS ODB API, and HDF5.
 ResInsight is under continuous development targeting two major releases per year. 
 For an overview of some of its new and exciting features, see the following: 
 
+- [ ResInsight 2021.04 ]({{< ref "releasenotes_2021_04.md" >}})
+
 - [ ResInsight 2020.10.1 ]({{< ref "releasenotes_2020_10_1.md" >}})
 
 - [ ResInsight 2020.10 ]({{< ref "releasenotes_2020_10.md" >}})

content/getting-started/whats-new/releasenotes_2021_04.md

@@ -0,0 +1,52 @@
++++
+title = "What's New in 2021.04"
+published = true
+weight = 10
+hidden = true
++++
+
+Version 2021.04 is a major update bringing a range of significant new and enhanced features as described below.
+
+## Streamlines
+![]({{< relref "" >}}images/3d-main-window/Streamlines.png)
+
+[Streamlines]({{< relref "plot-window/Streamlines" >}}) lets the user investigate the flow of different phases through a reservoar. It allows for selecting both an individual phase or a combination of phases colored by the dominant phase or velocity. The visualization and animation of streamlines requires the Eclipse properties **FLRGASI/J/K FLRWATI/J/K FLROILI/J/K**.
+
+
+## Objective Functions
+![]({{< relref "" >}}images/plot-window/ObjectiveFunctionsPlotColoring.png)
+
+[Objective Functions]({{< relref "plot-window/ObjectiveFunctions" >}}) are used to color the curves of an ensemble plot in ResInsight to highlight characteristics by a function definition based on individual summary vectors. As shown in the example above, the legend relates colours to values as calculated by a particular objective function and shows the use and formula of the objective function in the plot.
+
+
+## Vertical Flow Performance Plots
+![]({{< relref "" >}}images/plot-window/VFP_Plot.png)
+
+A [Vertical Flow Performance Plot (VFP Plot)]({{< relref "plot-window/VfpPlot" >}}) shows the relationship between bottom hole well conditions and wellhead pressure describing a well's ability to lift fluids to the surface. ResInsight can display both production and injection VFP plots.
+
+## Polygon Cell Filter
+![]({{< relref "" >}}images/3d-main-window/CellFilter_Polygon.png)
+
+[Polygon Cell Filter]({{< relref "3d-main-window/Filters" >}}) allows the user to define a filter by marking target points of a polygon in 3D view to include or exclude matching cells. Target points are defined and manipulated in 3D view as decribed in [User Defined Polyline Annotations]({{< relref "Annotations.md" >}}). Vertically, the filter can be set to use the XY target positions or IJK-index of targeted cells. The actual filtering can be specified to whole cells inside polygon, cell center inside polygon, or any cell corner inside polygon.
+
+
+## Multiselect including Undo/Redo of Operations
+![]({{< relref "" >}}images/getting-started/ResInsightPlotProjectTreeMultiSelectAction.png)
+
+[Multiple selection]({{< relref "getting-started/projecttree" >}}) of items in ResInsight offers an entrance to powerful combinations and collective actions including [Undo and Redo]({{< relref "getting-started/projecttree" >}}) functionality {{< image-in-text src="images/getting-started//ResInsightPlotProjectTreeToolbarUndoRedo.png" >}}. If the user regrets an action, for instance the color setting for multiple wells as exemplified above, the collective action can be undone by pressing *Undo*.
+
+## Ensemble RFT Plot - Color by Ensemble Parameter
+![]({{< relref "" >}}images/plot-window/EnsembleRftPlotColors.png)
+
+[Ensemble RFT Plot]({{< relref "plot-window/ensemblerftplot" >}}#color-by-ensemble-parameter) can be colored by Ensemble Parameter. One ensemble parameter is selected to control coloring. The ensemble parameter value for each case is used to pick a color in a color range. In this case a color legend appears.
+
+
+## Additional New Features and Enhancements
+ResInsight 2021.04 an additional set of new features and enhancements as described below:
+
+- Support for relperm and PVT plots for dual porosity models
+- Fixed issue related to negative values in delta case contour maps
+- Color legend for water saturations (SWAT) will now have blue on top
+- Execute last script from context menu of script folder
+
+See [**Release Notes on GitHub**](https://github.com/OPM/ResInsight/releases/) for further details and information.