diff --git a/README.md b/README.md
index cdafd00c..ed27e219 100644
--- a/README.md
+++ b/README.md
@@ -343,9 +343,10 @@ Currently the only type available is `generic`.
     - `extend`: [boolean=true] Extends the internal list of rotations with the one provided.
                 Otherwise just use the provided list.
     - `name`: [string=''] Used to identify this particular filter definition.
-    - `negative_bottom`: [boolean=true] Rotation for bottom components is computed substracting.
+    - `negative_bottom`: [boolean=true] Rotation for bottom components is computed via subtraction as `(component rot - angle)`.
+    - `invert_bottom`: [boolean=false] Rotation for bottom components is negated.
     - `rotations`: [list(list(string))] A list of pairs regular expression/rotation.
-                   Components matching the regular expression will be rotated the indicated angle.
+                   Components matching the regular expression will be rotated the indicated angle. Special names `_top` and `_bottom` will match all components on that side of the board.
 - subparts: Subparts
         This filter implements the KiCost subparts mechanism.
   * Valid keys:
@@ -2205,8 +2206,9 @@ Using it, instead of the internal filter named `_rot_footprint`, is the same her
 The filter supports the following options:
 
 - `extend`: [boolean=true] Extends the internal list of rotations with the one provided. Otherwise just use the provided list.
-- `negative_bottom`: [boolean=true] Rotation for bottom components is computed substracting. Note that this should be coherent with the `bottom_negative_x` of the position output.
-- `rotations`: [list(list(string))] A list of pairs regular expression/rotation. Components matching the regular expression will be rotated the indicated angle.
+- `negative_bottom`: [boolean=true] Rotation for bottom components is computed via subtraction as `(component rot - angle)`. Note that this should be coherent with the `bottom_negative_x` of the position output.
+- `invert_bottom`: [boolean=false] Rotation for bottom components is negated, resulting in either : `(- component rot - angle)` or when combined with `negative_bottom`, `(angle - component rot)`.
+- `rotations`: [list(list(string))] A list of pairs regular expression/rotation. Components matching the regular expression will be rotated the indicated angle. Special names `_top` and `_bottom` will match all components on that side of the board.
 
 In order to add a new rotation or just change an existing one you just need to use the `rotations` option.
 As an example: the internal list of rotations rotates QFN packages by 270 degrees, no suppose you want to rotate them just 90 degrees.
diff --git a/docs/README.in b/docs/README.in
index c6d93961..b364985b 100644
--- a/docs/README.in
+++ b/docs/README.in
@@ -1175,8 +1175,9 @@ Using it, instead of the internal filter named `_rot_footprint`, is the same her
 The filter supports the following options:
 
 - `extend`: [boolean=true] Extends the internal list of rotations with the one provided. Otherwise just use the provided list.
-- `negative_bottom`: [boolean=true] Rotation for bottom components is computed substracting. Note that this should be coherent with the `bottom_negative_x` of the position output.
-- `rotations`: [list(list(string))] A list of pairs regular expression/rotation. Components matching the regular expression will be rotated the indicated angle.
+- `negative_bottom`: [boolean=true] Rotation for bottom components is computed via substracting. Note that this should be coherent with the `bottom_negative_x` of the position output.
+- `invert_bottom`: [boolean=false] Rotation for bottom components is negated, resulting in either : `(- component rot - angle)` or when combined with `negative_bottom`, `(angle - component rot)`
+- `rotations`: [list(list(string))] A list of pairs regular expression/rotation. Components matching the regular expression will be rotated the indicated angle. Special names `_top` and `_bottom` will match all components on that side of the board.
 
 In order to add a new rotation or just change an existing one you just need to use the `rotations` option.
 As an example: the internal list of rotations rotates QFN packages by 270 degrees, no suppose you want to rotate them just 90 degrees.
diff --git a/kibot/fil_rot_footprint.py b/kibot/fil_rot_footprint.py
index 9319d433..601e829c 100644
--- a/kibot/fil_rot_footprint.py
+++ b/kibot/fil_rot_footprint.py
@@ -61,7 +61,9 @@ class Rot_Footprint(BaseFilter):  # noqa: F821
             """ Extends the internal list of rotations with the one provided.
                 Otherwise just use the provided list """
             self.negative_bottom = True
-            """ Rotation for bottom components is computed substracting """
+            """ Rotation for bottom components is computed via substracting """
+            self.invert_bottom = False
+            """ Rotation for bottom components is negated """
             self.rotations = Optionable
             """ [list(list(string))] A list of pairs regular expression/rotation.
                 Components matching the regular expression will be rotated the indicated angle """
@@ -90,12 +92,16 @@ class Rot_Footprint(BaseFilter):  # noqa: F821
     def filter(self, comp):
         """ Apply the rotation """
         for regex, angle in self._rot:
-            if regex.search(comp.footprint):
+            side = "_bottom" if comp.bottom else "_top"
+            match_string = comp.footprint + side
+            if regex.search(match_string):
                 old_angle = comp.footprint_rot
                 if self.negative_bottom and comp.bottom:
                     comp.footprint_rot -= angle
                 else:
                     comp.footprint_rot += angle
+                if self.invert_bottom and comp.bottom:
+                    comp.footprint_rot = -comp.footprint_rot
                 comp.footprint_rot = comp.footprint_rot % 360
                 if GS.debug_level > 2:
                     logger.debug('Rotating ref: {} {}: {} -> {}'.