Update DXF export section (#9095)

docs/user_manual/managing_data_source/create_layers.rst

@@ -520,9 +520,16 @@ In the :guilabel:`DXF Export` dialog:
    The :guilabel:`Select All` and :guilabel:`Deselect All` buttons
    can help to quickly set the data to export.
 
-   For each layer, you can choose whether to export all the features in a
-   single DXF layer or rely on a field whose values are used to split the
-   features into layers in the DXF output.
+   For each layer, you can:
+
+   * Override the output layer name without altering the original project
+     layer. For this, click on a layer name on the dialog's layers panel and
+     set the output layer name.
+
+   * Choose whether to export all the features in a single DXF layer or rely on
+     a field whose values are used to split the features into layers in the DXF
+     output. In the latter case, each layer will take its name from the
+     corresponding field value.
 
 Optionally, you can also choose to:
 
@@ -541,6 +548,20 @@ Optionally, you can also choose to:
 
    Exporting a project to DXF dialog
 
+Current settings defined in the :guilabel:`DXF Export` dialog may be stored in
+an XML file for reusing them in other sessions. For this, the
+:guilabel:`Settings` combo box has two options: :guilabel:`Load Settings from
+File...` and :guilabel:`Save Settings to File...`.
+
+.. note::
+
+   The precedence for defining the output layer name is as follows:
+
+   1. Output layer attribute (if any).
+   2. Overridden name (if any).
+   3. Layer title (if the corresponding option is checked and if a title has been set in layer properties).
+   4. Layer name.
+
 
 .. _paste_into_layer:
 

docs/user_manual/processing_algs/qgis/vectorgeneral.rst

@@ -1017,7 +1017,25 @@ Parameters
    * - **Input layers**
      - ``LAYERS``
      - [vector: any] [list]
-     - Input vector layers to export
+     - List of input vector layers with options associated (filled as a
+       :class:`QgsProcessingParameterDxfLayers
+       <qgis.core.QgsProcessingParameterDxfLayers>` item ---
+       done in GUI by pressing :guilabel:`Configure Layer...` button
+       for each selected layer):
+
+       **Layer** [string] (``layer``)
+         Full path of the input layer to export
+
+       **Output layer attribute** [number] (``attributeIndex``)
+         Attribute index to split the input layer using unique values
+
+       **Output layer name** [string] (``overriddenLayerName``)
+         Overridden layer name to be used in the exported DXF file (the
+         original project layer remains untouched)
+
+       **Allow data defined symbol blocks** [boolean] (``buildDataDefinedBlocks``)
+
+       **Maximum number of symbol blocks** [number] (``dataDefinedBlocksMaximumNumberOfClasses``)
    * - **Symbology mode**
      - ``SYMBOLOGY_MODE``
      - [enumeration]
@@ -1061,8 +1079,8 @@ Parameters
      - [boolean]
 
        Default: False
-     - Name the output layer with the layer title (as set in QGIS) instead
-       of the layer name.
+     - Name the output layer with the layer title (as set in layer metadata
+       or QGIS Server properties) instead of the layer name.
    * - **Force 2D**
      - ``FORCE_2D``
      - [boolean]