diff --git a/frontend/src/app/render_wasm/api.cljs b/frontend/src/app/render_wasm/api.cljs
index 27dc63e5c6..2561df05c5 100644
--- a/frontend/src/app/render_wasm/api.cljs
+++ b/frontend/src/app/render_wasm/api.cljs
@@ -1401,15 +1401,17 @@
   [width height]
   (h/call wasm/internal-module "_resize_viewbox" width height))
 
-(defn- debug-flags
+(defn- render-options-flags
   []
   (cond-> 0
     (dbg/enabled? :wasm-viewbox)
-    (bit-or 2r00000000000000000000000000000001)
+    (bit-or 0x01)
     (text-editor-wasm?)
-    (bit-or 2r00000000000000000000000000000100)
+    (bit-or 0x04)
     (contains? cf/flags :render-wasm-info)
-    (bit-or 2r00000000000000000000000000001000)))
+    (bit-or 0x08)
+    (contains? cf/flags :render-wasm-rulers)
+    (bit-or 0x10)))
 
 (defn- wasm-aa-threshold-from-route-params
   "Reads optional `aa_threshold` query param from the router"
@@ -1438,7 +1440,7 @@
 (defn init-canvas-context
   [canvas]
   (let [gl      (unchecked-get wasm/internal-module "GL")
-        flags   (debug-flags)
+        flags   (render-options-flags)
         context-id (if (dbg/enabled? :wasm-gl-context-init-error) "fail" "webgl2")
         context (.getContext ^js canvas context-id default-context-options)
         context-init? (not (nil? context))
diff --git a/render-wasm/src/main.rs b/render-wasm/src/main.rs
index 42a8c46671..a219f8538a 100644
--- a/render-wasm/src/main.rs
+++ b/render-wasm/src/main.rs
@@ -141,6 +141,8 @@ pub extern "C" fn set_render_options(debug: u32, dpr: f32) -> Result<()> {
         let render_state = state.render_state_mut();
         render_state.set_debug_flags(debug);
         render_state.set_dpr(dpr)?;
+
+        println!("rulers enabled? {:?}", render_state.options.are_rulers_enabled());
     });
     Ok(())
 }
diff --git a/render-wasm/src/render.rs b/render-wasm/src/render.rs
index 17e29f08d2..f4d4401fbd 100644
--- a/render-wasm/src/render.rs
+++ b/render-wasm/src/render.rs
@@ -607,7 +607,7 @@ impl RenderState {
     }
 
     pub fn set_debug_flags(&mut self, debug: u32) {
-        self.options.flags = debug;
+        self.options.set_flags(debug);
     }
 
     pub fn set_dpr(&mut self, dpr: f32) -> Result<()> {
diff --git a/render-wasm/src/render/options.rs b/render-wasm/src/render/options.rs
index 7b1a49f540..9e11ce7dde 100644
--- a/render-wasm/src/render/options.rs
+++ b/render-wasm/src/render/options.rs
@@ -3,10 +3,11 @@ const DEBUG_VISIBLE: u32 = 0x01;
 const PROFILE_REBUILD_TILES: u32 = 0x02;
 const TEXT_EDITOR_V3: u32 = 0x04;
 const SHOW_WASM_INFO: u32 = 0x08;
+const ENABLE_RULERS: u32 = 0x10;
 
 #[derive(Debug, Copy, Clone, PartialEq)]
 pub struct RenderOptions {
-    pub flags: u32,
+    flags: u32,
     pub dpr: Option<f32>,
     fast_mode: bool,
     /// Minimum on-screen size (CSS px at 1:1 zoom) above which vector antialiasing is enabled.
@@ -25,6 +26,14 @@ impl Default for RenderOptions {
 }
 
 impl RenderOptions {
+    pub fn set_flags(&mut self, flags: u32) {
+        self.flags = flags;
+    }
+
+    pub fn are_rulers_enabled(&self) -> bool {
+        self.flags & ENABLE_RULERS == ENABLE_RULERS
+    }
+
     pub fn is_debug_visible(&self) -> bool {
         self.flags & DEBUG_VISIBLE == DEBUG_VISIBLE
     }