diff --git a/affine.scad b/affine.scad
index 8b364bf..78684d6 100644
--- a/affine.scad
+++ b/affine.scad
@@ -11,6 +11,7 @@
 
 // Function: affine2d_identity()
 // Synopsis: Returns a 2D (3x3) identity transformation matrix.
+// SynTags: Mat
 // Topics: Affine, Matrices, Transforms
 // See Also: affine3d_identity(), ident(), IDENT
 // Usage:
@@ -30,6 +31,7 @@ function affine2d_identity() = ident(3);
 
 // Function: affine2d_translate()
 // Synopsis: Returns a 2D (3x3) translation transformation matrix.
+// SynTags: Mat
 // Topics: Affine, Matrices, Transforms, Translation
 // See Also: affine3d_translate(), move(), translate(), left(), right(), fwd(), back(), down(), up()
 // Usage:
@@ -57,6 +59,7 @@ function affine2d_translate(v=[0,0]) =
 
 // Function: affine2d_scale()
 // Synopsis: Returns a 2D (3x3) scaling transformation matrix.
+// SynTags: Mat
 // Topics: Affine, Matrices, Transforms, Scaling
 // See Also: affine3d_scale(), scale(), xscale(), yscale(), zscale(), affine3d_scale()
 // Usage:
@@ -84,6 +87,7 @@ function affine2d_scale(v=[1,1]) =
 
 // Function: affine2d_zrot()
 // Synopsis: Returns a 2D (3x3) rotation transformation matrix.
+// SynTags: Mat
 // Topics: Affine, Matrices, Transforms, Rotation
 // See Also: rot(), xrot(), yrot(), zrot(), affine3d_zrot()
 // Usage:
@@ -111,6 +115,7 @@ function affine2d_zrot(ang=0) =
 
 // Function: affine2d_mirror()
 // Synopsis: Returns a 2D (3x3) reflection transformation matrix.
+// SynTags: Mat
 // Topics: Affine, Matrices, Transforms, Reflection, Mirroring
 // See Also: mirror(), xflip(), yflip(), zflip(), affine3d_mirror()
 // Usage:
@@ -155,6 +160,7 @@ function affine2d_mirror(v) =
 
 // Function: affine2d_skew()
 // Synopsis: Returns a 2D (3x3) skewing transformation matrix.
+// SynTags: Mat
 // Topics: Affine, Matrices, Transforms, Skewing
 // See Also: skew(), affine3d_skew()
 // Usage:
@@ -190,6 +196,7 @@ function affine2d_skew(xa=0, ya=0) =
 
 // Function: affine3d_identity()
 // Synopsis: Returns a 3D (4x4) identity transformation matrix.
+// SynTags: Mat
 // Topics: Affine, Matrices, Transforms
 // See Also: affine2d_identity(), ident(), IDENT
 // Usage:
@@ -210,6 +217,7 @@ function affine3d_identity() = ident(4);
 
 // Function: affine3d_translate()
 // Synopsis: Returns a 3D (4x4) translation transformation matrix.
+// SynTags: Mat
 // Topics: Affine, Matrices, Transforms, Translation
 // See Also: move(), translate(), left(), right(), fwd(), back(), down(), up(), affine2d_translate()
 // Usage:
@@ -240,6 +248,7 @@ function affine3d_translate(v=[0,0,0]) =
 
 // Function: affine3d_scale()
 // Synopsis: Returns a 3D (4x4) scaling transformation matrix.
+// SynTags: Mat
 // Topics: Affine, Matrices, Transforms, Scaling
 // See Also: scale(), affine2d_scale()
 // Usage:
@@ -270,6 +279,7 @@ function affine3d_scale(v=[1,1,1]) =
 
 // Function: affine3d_xrot()
 // Synopsis: Returns a 3D (4x4) X-axis rotation transformation matrix.
+// SynTags: Mat
 // Topics: Affine, Matrices, Transforms, Rotation
 // See Also: rot(), xrot(), yrot(), zrot(), affine2d_zrot()
 // Usage:
@@ -299,6 +309,7 @@ function affine3d_xrot(ang=0) =
 
 // Function: affine3d_yrot()
 // Synopsis: Returns a 3D (4x4) Y-axis rotation transformation matrix.
+// SynTags: Mat
 // Topics: Affine, Matrices, Transforms, Rotation
 // See Also: rot(), xrot(), yrot(), zrot(), affine2d_zrot()
 // Usage:
@@ -328,6 +339,7 @@ function affine3d_yrot(ang=0) =
 
 // Function: affine3d_zrot()
 // Synopsis: Returns a 3D (4x4) Z-axis rotation transformation matrix.
+// SynTags: Mat
 // Topics: Affine, Matrices, Transforms, Rotation
 // See Also: rot(), xrot(), yrot(), zrot(), affine2d_zrot()
 // Usage:
@@ -357,6 +369,7 @@ function affine3d_zrot(ang=0) =
 
 // Function: affine3d_rot_by_axis()
 // Synopsis: Returns a 3D (4x4) arbitrary-axis rotation transformation matrix.
+// SynTags: Mat
 // Topics: Affine, Matrices, Transforms, Rotation
 // See Also: rot(), xrot(), yrot(), zrot(), affine2d_zrot()
 // Usage:
@@ -394,6 +407,7 @@ function affine3d_rot_by_axis(u=UP, ang=0) =
 
 // Function: affine3d_rot_from_to()
 // Synopsis: Returns a 3D (4x4) tilt rotation transformation matrix.
+// SynTags: Mat
 // Topics: Affine, Matrices, Transforms, Rotation
 // See Also: rot(), xrot(), yrot(), zrot(), affine2d_zrot()
 // Usage:
@@ -441,6 +455,7 @@ function affine3d_rot_from_to(from, to) =
 
 // Function: affine3d_mirror()
 // Synopsis: Returns a 3D (4x4) reflection transformation matrix.
+// SynTags: Mat
 // Topics: Affine, Matrices, Transforms, Reflection, Mirroring
 // See Also: mirror(), xflip(), yflip(), zflip(), affine2d_mirror()
 // Usage:
@@ -482,6 +497,7 @@ function affine3d_mirror(v) =
 
 // Function: affine3d_skew()
 // Synopsis: Returns a 3D (4x4) skewing transformation matrix.
+// SynTags: Mat
 // Topics: Affine, Matrices, Transforms, Skewing
 // See Also: skew(), affine3d_skew_xy(), affine3d_skew_xz(), affine3d_skew_yz(), affine2d_skew()
 // Usage:
@@ -514,6 +530,7 @@ function affine3d_skew(sxy=0, sxz=0, syx=0, syz=0, szx=0, szy=0) = [
 
 // Function: affine3d_skew_xy()
 // Synopsis: Returns a 3D (4x4) XY-plane skewing transformation matrix.
+// SynTags: Mat
 // Topics: Affine, Matrices, Transforms, Skewing
 // See Also: skew(), affine3d_skew(), affine3d_skew_xz(), affine3d_skew_yz(), affine2d_skew()
 // Usage:
@@ -547,6 +564,7 @@ function affine3d_skew_xy(xa=0, ya=0) =
 
 // Function: affine3d_skew_xz()
 // Synopsis: Returns a 3D (4x4) XZ-plane skewing transformation matrix.
+// SynTags: Mat
 // Topics: Affine, Matrices, Transforms, Skewing
 // See Also: skew(), affine3d_skew(), affine3d_skew_xy(), affine3d_skew_yz(), affine2d_skew()
 // Usage:
@@ -580,6 +598,7 @@ function affine3d_skew_xz(xa=0, za=0) =
 
 // Function: affine3d_skew_yz()
 // Synopsis: Returns a 3D (4x4) YZ-plane skewing transformation matrix.
+// SynTags: Mat
 // Topics: Affine, Matrices, Transforms, Skewing
 // See Also: skew(), affine3d_skew(), affine3d_skew_xy(), affine3d_skew_xz(), affine2d_skew()
 // Usage:
diff --git a/attachments.scad b/attachments.scad
index 7bfffb5..fe35a93 100644
--- a/attachments.scad
+++ b/attachments.scad
@@ -2904,6 +2904,7 @@ function _standard_anchors(two_d=false) = [
 
 // Module: show_anchors()
 // Synopsis: Shows anchors for the parent object.
+// SynTags: Geom
 // Topics: Attachments
 // See Also: expose_anchors(), anchor_arrow(), anchor_arrow2d(), frame_ref()
 // Usage:
@@ -2967,6 +2968,7 @@ module show_anchors(s=10, std=true, custom=true) {
 
 // Module: anchor_arrow()
 // Synopsis: Shows a 3d anchor orientation arrow.
+// SynTags: Geom
 // Topics: Attachments
 // See Also: anchor_arrow2d(), show_anchors(), expose_anchors(), frame_ref()
 // Usage:
@@ -3005,6 +3007,7 @@ module anchor_arrow(s=10, color=[0.333,0.333,1], flag=true, $tag="anchor-arrow",
 
 // Module: anchor_arrow2d()
 // Synopsis: Shows a 2d anchor orientation arrow.
+// SynTags: Geom
 // Topics: Attachments
 // See Also: anchor_arrow(), show_anchors(), expose_anchors(), frame_ref()
 // Usage:
@@ -3050,6 +3053,7 @@ module expose_anchors(opacity=0.2) {
 
 // Module: frame_ref()
 // Synopsis: Shows axis orientation arrows.
+// SynTags: Geom
 // Topics: Attachments
 // See Also: anchor_arrow(), anchor_arrow2d(), show_anchors(), expose_anchors()
 // Usage:
diff --git a/ball_bearings.scad b/ball_bearings.scad
index 2c98a84..0e27d91 100644
--- a/ball_bearings.scad
+++ b/ball_bearings.scad
@@ -14,6 +14,7 @@
 
 // Module: ball_bearing()
 // Synopsis: Creates a standardized ball bearing assembly.
+// SynTags: Geom
 // Topics: Parts, Bearings
 // See Also: linear_bearing(), lmXuu_bearing(), lmXuu_housing()
 // Description:
@@ -27,13 +28,13 @@
 //   spin = Rotate this many degrees around the Z axis after anchor.  See [spin](attachments.scad#subsection-spin).  Default: `0`
 //   orient = Vector to rotate top towards, after spin.  See [orient](attachments.scad#subsection-orient).  Default: `UP`
 // Example:
-//   ball_bearing("608");
+//   ball_bearing("608", $fn=72);
 // Example:
-//   ball_bearing("608ZZ");
+//   ball_bearing("608ZZ", $fn=72);
 // Example:
-//   ball_bearing("R8");
+//   ball_bearing("R8", $fn=72);
 // Example:
-//   ball_bearing(id=12,od=32,width=10,shield=false);
+//   ball_bearing(id=12,od=32,width=10,shield=false, $fn=72);
 module ball_bearing(trade_size, id, od, width, shield=true, anchor=CTR, spin=0, orient=UP) {
     info = is_undef(trade_size)? [id, od, width, shield] :
         ball_bearing_info(trade_size);
@@ -73,7 +74,7 @@ module ball_bearing(trade_size, id, od, width, shield=true, anchor=CTR, spin=0,
 
 
 // Function: ball_bearing_info()
-// Synopsis: Creates a standardized ball bearing assembly.
+// Synopsis: Returns size info for a standardized ball bearing assembly.
 // Topics: Parts, Bearings
 // See Also: ball_bearing(), linear_bearing(), lmXuu_info()
 // Description:
diff --git a/beziers.scad b/beziers.scad
index 3a48b6f..d5d5833 100644
--- a/beziers.scad
+++ b/beziers.scad
@@ -29,6 +29,7 @@
 
 // Function: bezier_points()
 // Synopsis: Computes one or more specified points along a bezier curve.
+// SynTags: Path
 // Topics: Bezier Curves
 // See Also: bezier_curve(), bezier_curvature(), bezier_tangent(), bezier_derivative(), bezier_points()
 // Usage:
@@ -179,6 +180,7 @@ function _bezier_matrix(N) =
 
 // Function: bezier_curve()
 // Synopsis: Computes a number of uniformly distributed points along a bezier curve.
+// SynTags: Path
 // Topics: Bezier Curves
 // See Also: bezier_curve(), bezier_curvature(), bezier_tangent(), bezier_derivative(), bezier_points()
 // Usage:
@@ -414,6 +416,7 @@ function bezier_line_intersection(bezier, line) =
 
 // Function: bezpath_points()
 // Synopsis: Computes one or more specified points along a bezier path.
+// SynTags: Path
 // Topics: Bezier Paths
 // See Also: bezier_points(), bezier_curve()
 // Usage:
@@ -435,6 +438,7 @@ function bezpath_points(bezpath, curveind, u, N=3) =
 
 // Function: bezpath_curve()
 // Synopsis: Takes a bezier path and converts it into a path of points.
+// SynTags: Path
 // Topics: Bezier Paths
 // See Also: bezier_points(), bezier_curve(), bezpath_points()
 // Usage:
@@ -544,6 +548,7 @@ function bezpath_length(bezpath, N=3, max_deflect=0.001) =
 
 // Function: path_to_bezpath()
 // Synopsis: Generates a bezier path that passes through all points in a given linear path.
+// SynTags: Path
 // Topics: Bezier Paths, Rounding
 // See Also: path_tangents()
 // Usage:
@@ -631,6 +636,7 @@ function path_to_bezpath(path, closed, tangents, uniform=false, size, relsize) =
 
 // Function: bezpath_close_to_axis()
 // Synopsis: Closes a 2D bezier path to the specified axis.
+// SynTags: Path
 // Topics: Bezier Paths
 // See Also: bezpath_offset()
 // Usage:
@@ -675,6 +681,7 @@ function bezpath_close_to_axis(bezpath, axis="X", N=3) =
 
 // Function: bezpath_offset()
 // Synopsis: Forms a closed bezier path loop with a translated and reversed copy of itself.
+// SynTags: Path
 // Topics: Bezier Paths
 // See Also: bezpath_close_to_axis()
 // Usage:
@@ -1012,6 +1019,7 @@ function _bezier_rectangle(patch, splinesteps=16, style="default") =
 
 // Function: bezier_vnf()
 // Synopsis: Generates a (probably non-manifold) VNF for one or more bezier surface patches.
+// SynTags: VNF
 // Topics: Bezier Patches
 // See Also: bezier_patch_points(), bezier_patch_flat()
 // Usage:
@@ -1139,6 +1147,7 @@ function bezier_vnf(patches=[], splinesteps=16, style="default") =
 
 // Function: bezier_vnf_degenerate_patch()
 // Synopsis: Generates a VNF for a degenerate bezier surface patch.
+// SynTags: VNF
 // Topics: Bezier Patches
 // See Also: bezier_patch_points(), bezier_patch_flat(), bezier_vnf()
 // Usage:
@@ -1439,6 +1448,7 @@ function bezier_patch_normals(patch, u, v) =
 
 // Module: debug_bezier()
 // Synopsis: Shows a bezier path and it's associated control points.
+// SynTags: Geom
 // Topics: Bezier Paths, Debugging
 // See Also: bezpath_curve()
 // Usage:
@@ -1493,6 +1503,7 @@ module debug_bezier(bezpath, width=1, N=3) {
 
 // Module: debug_bezier_patches()
 // Synopsis: Shows a bezier surface patch and its associated control points.
+// SynTags: Geom
 // Topics: Bezier Patches, Debugging
 // See Also: bezier_patch_points(), bezier_patch_flat(), bezier_vnf()
 // Usage:
diff --git a/bottlecaps.scad b/bottlecaps.scad
index 13f6c0b..fd56dae 100644
--- a/bottlecaps.scad
+++ b/bottlecaps.scad
@@ -18,6 +18,7 @@ include <rounding.scad>
 
 // Module: pco1810_neck()
 // Synopsis: Creates a neck for a PCO1810 standard bottle.
+// SynTags: Geom
 // Topics: Bottles, Threading
 // See Also: pco1810_cap()
 // Usage:
@@ -142,6 +143,7 @@ function  pco1810_neck(wall=2, anchor="support-ring", spin=0, orient=UP) =
 
 // Module: pco1810_cap()
 // Synopsis: Creates a cap for a PCO1810 standard bottle.
+// SynTags: Geom
 // Topics: Bottles, Threading
 // See Also: pco1810_neck()
 // Usage:
@@ -212,6 +214,7 @@ function pco1810_cap(wall=2, texture="none", anchor=BOTTOM, spin=0, orient=UP) =
 
 // Module: pco1881_neck()
 // Synopsis: Creates a neck for a PCO1881 standard bottle.
+// SynTags: Geom
 // Topics: Bottles, Threading
 // See Also: pco1881_cap()
 // Usage:
@@ -336,6 +339,7 @@ function pco1881_neck(wall=2, anchor="support-ring", spin=0, orient=UP) =
 
 // Module: pco1881_cap()
 // Synopsis: Creates a cap for a PCO1881 standard bottle.
+// SynTags: Geom
 // Topics: Bottles, Threading
 // See Also: pco1881_neck()
 // Usage:
@@ -398,6 +402,7 @@ function pco1881_cap(wall=2, texture="none", anchor=BOTTOM, spin=0, orient=UP) =
 
 // Module: generic_bottle_neck()
 // Synopsis: Creates a generic neck for a bottle.
+// SynTags: Geom
 // Topics: Bottles, Threading
 // See Also: generic_bottle_cap()
 // Usage:
@@ -528,6 +533,7 @@ function generic_bottle_neck(
 
 // Module: generic_bottle_cap()
 // Synopsis: Creates a generic cap for a bottle.
+// SynTags: Geom
 // Topics: Bottles, Threading
 // See Also: generic_bottle_neck()
 // Usage:
@@ -616,6 +622,7 @@ function generic_bottle_cap(
 
 // Module: bottle_adapter_neck_to_cap()
 // Synopsis: Creates a generic adaptor between a neck and a cap.
+// SynTags: Geom
 // Topics: Bottles, Threading
 // See Also: bottle_adapter_neck_to_neck()
 // Usage:
@@ -745,6 +752,7 @@ function bottle_adapter_neck_to_cap(
 
 // Module: bottle_adapter_cap_to_cap()
 // Synopsis: Creates a generic adaptor between a cap and a cap.
+// SynTags: Geom
 // Topics: Bottles, Threading
 // See Also: bottle_adapter_neck_to_cap(), bottle_adapter_neck_to_neck()
 // Usage:
@@ -869,6 +877,7 @@ function bottle_adapter_cap_to_cap(
 
 // Module: bottle_adapter_neck_to_neck()
 // Synopsis: Creates a generic adaptor between a neck and a neck.
+// SynTags: Geom
 // Topics: Bottles, Threading
 // See Also: bottle_adapter_neck_to_cap(), bottle_adapter_cap_to_cap()
 // Usage:
@@ -1005,6 +1014,7 @@ function bottle_adapter_neck_to_neck(
 
 // Module: sp_neck()
 // Synopsis: Creates an SPI threaded bottle neck.
+// SynTags: Geom
 // Topics: Bottles, Threading
 // See Also: sp_cap()
 // Usage:
@@ -1208,6 +1218,7 @@ module sp_neck(diam,type,wall,id,style="L",bead=false, anchor, spin, orient)
 
 // Module: sp_cap()
 // Synopsis: Creates an SPI threaded bottle cap.
+// SynTags: Geom
 // Topics: Bottles, Threading
 // See Also: sp_neck()
 // Usage: