diff --git a/backend/app/converter/atl.py b/backend/app/converter/atl.py
index 2bf2659..d2b7774 100644
--- a/backend/app/converter/atl.py
+++ b/backend/app/converter/atl.py
@@ -43,8 +43,7 @@ LEADING_ZERO = re.compile(r"(?<![\w.])0+(\d)(?![\d.]*[\w.])")
 SPLIT_SIGN = re.compile(r"^([a-z_]+)(-[\d.]+)$")
 IGNORED = {"subpixel", "animation", "around", "alignaround", "rotate_pad"}  # no visible effect in the browser
 # Purely graphical GPU hints; dropping them changes how a picture is drawn, never what happens
-COSMETIC = ("xpan", "ypan", "matrixtransform", "matrixanchor", "transform_anchor", "shader", "mesh", "gl_", "u_", "blend", "additive", "perspective", "point_to", "xrotate", "yrotate",
-            "zrotate", "zpos", "zzoom", "delay", "events", "fit", "nearest", "fps", "show_cancels_hide")
+COSMETIC = ("shader", "mesh", "gl_", "u_", "perspective", "point_to", "delay", "events", "nearest", "fps", "show_cancels_hide")
 NAMED_POSITIONS = {
     "left": {"xpos": 0.0, "xanchor": 0.0}, "right": {"xpos": 1.0, "xanchor": 1.0},
     "center": {"xpos": 0.5, "xanchor": 0.5}, "truecenter": {"xpos": 0.5, "xanchor": 0.5, "ypos": 0.5, "yanchor": 0.5},
diff --git a/backend/app/converter/rpy_helpers.py b/backend/app/converter/rpy_helpers.py
index 3c24bbd..2d511e4 100644
--- a/backend/app/converter/rpy_helpers.py
+++ b/backend/app/converter/rpy_helpers.py
@@ -12,7 +12,9 @@ Node = dict[str, Any]
 POSITION_PROPS = {"xpos", "ypos", "xanchor", "yanchor", "xalign", "yalign", "xcenter",
                   "ycenter", "zoom", "xzoom", "yzoom", "alpha", "rotate", "xoffset", "yoffset",
                   "align", "pos", "anchor", "xysize", "size", "blur", "matrixcolor", "xycenter",
-                  "xsize", "ysize", "crop"}
+                  "xsize", "ysize", "crop", "xpan", "ypan", "xtile", "ytile", "xrotate", "yrotate", "zrotate", "zpos",
+                  "zzoom", "blend", "additive", "transform_anchor", "rotate_pad", "matrixanchor", "matrixtransform",
+                  "fit", "maxsize", "crop_relative"}
 
 
 _SHOW_KEYWORDS = {"at", "as", "behind", "onlayer", "with", "zorder"}