DataGrid/TreeList: update "sticky" demo descriptions (#28393)

Author: vladaskorohodova

apps/demos/Demos/DataGrid/ColumnReordering/description.md

@@ -1,6 +1,6 @@
-DataGrid columns have the same order as fields in data objects. You can use the [columns](/Documentation/ApiReference/UI_Components/dxDataGrid/Configuration/columns/) array to specify a different order. To reorder a column at runtime, change its [visibleIndex](/Documentation/ApiReference/UI_Components/dxDataGrid/Configuration/columns/#visibleIndex) property.
+DataGrid columns have the same order as fields in data objects. You can use the [columns](/Documentation/ApiReference/UI_Components/dxDataGrid/Configuration/columns/) array to specify a different order. To reorder a column at runtime, change **column**.[visibleIndex](/Documentation/ApiReference/UI_Components/dxDataGrid/Configuration/columns/#visibleIndex) property.
 
-Users can drag and drop column headers to reorder columns. To enable this feature, set the [allowColumnReordering](/Documentation/ApiReference/UI_Components/dxDataGrid/Configuration/#allowColumnReordering) property to **true**. If you do not want users to drag a specific column, disable its [allowReordering](/Documentation/ApiReference/UI_Components/dxDataGrid/Configuration/columns/#allowReordering) property. In this demo, users cannot drag the Full Name column.
+Users can drag and drop column headers to reorder columns. To enable this feature, set the [allowColumnReordering](/Documentation/ApiReference/UI_Components/dxDataGrid/Configuration/#allowColumnReordering) property to **true**. If you do not want users to drag a specific column, disable its **column**.[allowReordering](/Documentation/ApiReference/UI_Components/dxDataGrid/Configuration/columns/#allowReordering) property.
 <!--split-->
 
 This demo shows how [fixed](/Documentation/ApiReference/UI_Components/dxDataGrid/Configuration/columns/#fixed) columns behave during user-initiated reordering. Users can drag and drop columns within the following areas (but not between them):
@@ -9,4 +9,4 @@ This demo shows how [fixed](/Documentation/ApiReference/UI_Components/dxDataGrid
 - Non-fixed columns
 - Columns fixed to the right
 
-Sticky columns (fixed with the 'sticky' [position](/Documentation/ApiReference/UI_Components/dxDataGrid/Configuration/columns/#fixedPosition)) behave like non-fixed columns during reordering (even if they are in a state where they are attached to a border).
+Sticky columns (fixed with the 'sticky' [position](/Documentation/ApiReference/UI_Components/dxDataGrid/Configuration/columns/#fixedPosition)) behave like non-fixed columns during reordering (even if they are in a state where they are attached to a border/fixed column). To see sticky columns in this demo, right-click a column to open a context menu. Choose "Set Fixed Position -> Sticky" to stick a column.

apps/demos/Demos/DataGrid/FixedAndStickyColumns/description.md

@@ -1,8 +1,15 @@
-A horizontal scrollbar appears when the total width of all columns exceeds the DataGrid component's width. The component allows users to fix individual columns at the right or left border so that they are always visible. Users can also set sticky columns so that they initially remain static but start scrolling when they reach their position. Once scrolling moves past this point, they reattach to a different side of the table.
+A horizontal scrollbar appears when the total width of all columns exceeds the DataGrid component's width. To keep a column visible when scrolling, set the **columnFixing**.[enabled](/Documentation/ApiReference/UI_Components/dxDataGrid/Configuration/columnFixing/#enabled) property to `true`.
 
-To enable this feature, set the **columnFixing**.[enabled](/Documentation/ApiReference/UI_Components/dxDataGrid/Configuration/columnFixing/#enabled) property to `true`.
-<!--split-->
+To fix a column programmatically, set its [fixed](/Documentation/ApiReference/UI_Components/dxDataGrid/Configuration/columns/#fixed) property to `true` and select the column's [fixedPosition](/Documentation/ApiReference/UI_Components/dxDataGrid/Configuration/columns/#fixedPosition):
+
+- *'left'* (default if `fixed: true`)    
+The column is fixed to the left edge of the grid.
 
-To fix or unfix a column, users should right-click the column's header and select the corresponding operation in the context menu. To prevent users from fixing or unfixing a column, set its [allowFixing](/Documentation/ApiReference/UI_Components/dxDataGrid/Configuration/columns/#allowFixing) property to `false`.
+- *'right'*    
+The column is fixed to the right edge of the grid.
+
+- *'sticky'*    
+The column sticks to left and right edges when it reaches them.
+<!--split-->
 
-To fix a column programmatically, set its [fixed](/Documentation/ApiReference/UI_Components/dxDataGrid/Configuration/columns/#fixed) property to `true`. The default position is the DataGrid's left, but you can set the column's [fixedPosition](/Documentation/ApiReference/UI_Components/dxDataGrid/Configuration/columns/#fixedPosition) property to *"right"* or *"sticky"*.
+To fix or unfix a column, users should right-click the column's header and select the corresponding operation in the context menu. To prevent users from fixing or unfixing a column, set its [allowFixing](/Documentation/ApiReference/UI_Components/dxDataGrid/Configuration/columns/#allowFixing) property to `false`.

apps/demos/Demos/TreeList/ColumnFixing/description.md

@@ -1,8 +1,15 @@
-A horizontal scrollbar appears when the total width of all columns exceeds the TreeList component's width. The component allows users to fix individual columns at the right or left border so that they are always visible. Users can also set sticky columns so that they initially remain static but start scrolling when they reach their position. Once scrolling moves past this point, they reattach to a different side of the table.
+A horizontal scrollbar appears when the total width of all columns exceeds the TreeList component's width. To keep a column visible when scrolling, set the **columnFixing**.[enabled](/Documentation/ApiReference/UI_Components/dxTreeList/Configuration/columnFixing/#enabled) property to `true`.
 
-To enable this feature, set the **columnFixing**.[enabled](/Documentation/ApiReference/UI_Components/dxTreeList/Configuration/columnFixing/#enabled) property to `true`.
-<!--split-->
+To fix a column programmatically, set its [fixed](/Documentation/ApiReference/UI_Components/dxTreeList/Configuration/columns/#fixed) property to `true` and select the column's [fixedPosition](/Documentation/ApiReference/UI_Components/dxTreeList/Configuration/columns/#fixedPosition):
+
+- *'left'* (default if `fixed: true`)    
+The column is fixed to the left edge of the grid.
 
-To fix or unfix a column, users should right-click the column's header and select the corresponding operation in the context menu. To prevent users from fixing or unfixing a column, set its [allowFixing](/Documentation/ApiReference/UI_Components/dxTreeList/Configuration/columns/#allowFixing) property to `false`.
+- *'right'*    
+The column is fixed to the right edge of the grid.
+
+- *'sticky'*    
+The column sticks to left and right edges when it reaches them.
+<!--split-->
 
-To fix a column programmatically, set its [fixed](/Documentation/ApiReference/UI_Components/dxTreeList/Configuration/columns/#fixed) property to `true`. The default position is the TreeList's left, but you can set the column's [fixedPosition](/Documentation/ApiReference/UI_Components/dxTreeList/Configuration/columns/#fixedPosition) property to *"right"* or *"sticky"*.
+To fix or unfix a column, users should right-click the column's header and select the corresponding operation in the context menu. To prevent users from fixing or unfixing a column, set its [allowFixing](/Documentation/ApiReference/UI_Components/dxTreeList/Configuration/columns/#allowFixing) property to `false`.

apps/demos/Demos/TreeList/Reordering/description.md

@@ -1,6 +1,6 @@
-TreeList columns have the same order as fields in data objects. You can use the [columns](/Documentation/ApiReference/UI_Components/dxTreeList/Configuration/columns/) array to specify a different order. To reorder a column at runtime, change its [visibleIndex](/Documentation/ApiReference/UI_Components/dxTreeList/Configuration/columns/#visibleIndex) property.
+TreeList columns have the same order as fields in data objects. You can use the [columns](/Documentation/ApiReference/UI_Components/dxTreeList/Configuration/columns/) array to specify a different order. To reorder a column at runtime, change **column**.[visibleIndex](/Documentation/ApiReference/UI_Components/dxTreeList/Configuration/columns/#visibleIndex) property.
 
-Users can drag and drop column headers to reorder columns. To enable this feature, set the [allowColumnReordering](/Documentation/ApiReference/UI_Components/dxTreeList/Configuration/#allowColumnReordering) property to **true**. If you do not want users to drag a specific column, disable its [allowReordering](/Documentation/ApiReference/UI_Components/dxTreeList/Configuration/columns/#allowReordering) property. In this demo, users cannot drag the Full Name column.
+Users can drag and drop column headers to reorder columns. To enable this feature, set the [allowColumnReordering](/Documentation/ApiReference/UI_Components/dxTreeList/Configuration/#allowColumnReordering) property to **true**. If you do not want users to drag a specific column, disable  **column**.[allowReordering](/Documentation/ApiReference/UI_Components/dxTreeList/Configuration/columns/#allowReordering) property.
 <!--split-->
 
 This demo shows how [fixed](/Documentation/ApiReference/UI_Components/dxTreeList/Configuration/columns/#fixed) columns behave during user-initiated reordering. Users can drag and drop columns within the following areas (but not between them):
@@ -9,4 +9,4 @@ This demo shows how [fixed](/Documentation/ApiReference/UI_Components/dxTreeList
 - Non-fixed columns
 - Columns fixed to the right
 
-Sticky columns (fixed with the 'sticky' [position](/Documentation/ApiReference/UI_Components/dxTreeList/Configuration/columns/#fixedPosition)) behave like non-fixed columns during reordering (even if they are in a state where they are attached to a border).
+Sticky columns (fixed with the 'sticky' [position](/Documentation/ApiReference/UI_Components/dxTreeList/Configuration/columns/#fixedPosition)) behave like non-fixed columns during reordering (even if they are in a state where they are attached to a border/fixed column). To see sticky columns in this demo, right-click a column to open a context menu. Choose "Set Fixed Position -> Sticky" to stick a column.