Add drag-value section

drag-value.md

@@ -0,0 +1,24 @@
+# Drag Value
+
+Since **v1.3-beta12**, from *Edit > Keyboard Shortcuts > Drag Value*,
+you can configure a key to be pressed and move/drag the mouse in a
+specific direction (e.g. left/right or up/down) to change a specific
+value/parameter inside Aseprite until you release the key.
+
+By default, <kbd>Ctrl+Alt</kbd> is configured in such a way to
+increase/decrease the Brush Size moving the mouse from left to
+right/right to left:
+
+![Drag Value Section](preferences/drag-value.png)
+
+The controls at the bottom indicates the direction of the increment
+(right) and the distance of pixels (4) that the mouse must travel to
+increment one unit (in this case one unit of the Brush Size).
+
+![Controls](preferences/drag-options.png)
+
+---
+
+**SEE ALSO**
+
+[Issue #3195](https://github.com/aseprite/aseprite/issues/3195)

zoom.md

@@ -17,10 +17,14 @@ Or using other alternatives:
   <kbd>5</kbd>, <kbd>6</kbd> (those above the QWERTY keys), to change the zoom to
   100%, 200%, 400%, 800%, 1600%, 3200% respectively.
 * The mouse wheel ([details](https://github.com/aseprite/aseprite/issues/2896)).
+* Or since **v1.3-beta12**, you can [configure a key](drag-value.md)
+  to zoom pressing a key (and hold it down) and move the mouse in a
+  specific direction.
 
 ---
 
 **SEE ALSO**
 
 [Drawing](drawing.md) |
+[Drag Value](drag-value.md) |
 [Mouse Wheel Behavior](https://github.com/aseprite/aseprite/issues/2896)