diff --git a/Cargo.lock b/Cargo.lock
index de403e4..b0ef5c0 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -934,7 +934,7 @@ dependencies = [
 
 [[package]]
 name = "tengri"
-version = "0.7.0"
+version = "0.7.1"
 dependencies = [
  "tengri_dsl",
  "tengri_input",
@@ -944,7 +944,7 @@ dependencies = [
 
 [[package]]
 name = "tengri_dsl"
-version = "0.7.0"
+version = "0.7.1"
 dependencies = [
  "itertools 0.14.0",
  "konst",
@@ -955,7 +955,7 @@ dependencies = [
 
 [[package]]
 name = "tengri_input"
-version = "0.7.0"
+version = "0.7.1"
 dependencies = [
  "tengri_dsl",
  "tengri_tui",
@@ -963,7 +963,7 @@ dependencies = [
 
 [[package]]
 name = "tengri_output"
-version = "0.7.0"
+version = "0.7.1"
 dependencies = [
  "proptest",
  "proptest-derive",
@@ -974,7 +974,7 @@ dependencies = [
 
 [[package]]
 name = "tengri_tui"
-version = "0.7.0"
+version = "0.7.1"
 dependencies = [
  "atomic_float",
  "better-panic",
diff --git a/Cargo.toml b/Cargo.toml
index aa4ceae..b9a6dab 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,5 +1,5 @@
 [workspace.package]
-version = "0.7.0"
+version = "0.7.1"
 
 [workspace]
 resolver = "2"
diff --git a/output/src/lib.rs b/output/src/lib.rs
index 3abccd4..baaf657 100644
--- a/output/src/lib.rs
+++ b/output/src/lib.rs
@@ -42,12 +42,3 @@ pub type Perhaps<T> = Result<Option<T>, Box<dyn Error>>;
     }
     Ok(())
 }
-
-#[cfg(test)] #[test] fn test_dimensions () {
-    use crate::*;
-    assert_eq!(Area::center(&[10u16, 10, 20, 20]), [20, 20]);
-}
-
-#[cfg(test)] #[test] fn test_layout () -> Usually<()> {
-    Ok(())
-}
diff --git a/output/src/ops.rs b/output/src/ops.rs
index b1a5786..b10d8e2 100644
--- a/output/src/ops.rs
+++ b/output/src/ops.rs
@@ -1,3 +1,5 @@
+use crate::*;
+
 mod align;     pub use self::align::*;
 mod bsp;       pub use self::bsp::*;
 mod cond;      pub use self::cond::*;
diff --git a/output/src/ops/align.rs b/output/src/ops/align.rs
index d254ce3..e9ff5a7 100644
--- a/output/src/ops/align.rs
+++ b/output/src/ops/align.rs
@@ -40,20 +40,24 @@ try_from_expr!(<'a, E>: Align<RenderBox<'a, E>>: |state, iter|{
             "align/n"|"align/s"|"align/e"|"align/w"|
             "align/nw"|"align/sw"|"align/ne"|"align/se" => {
                 let _ = iter.next().unwrap();
-                let c = iter.next().expect("no content specified");
-                let c = state.get_content(&c.value).expect("no content provided");
+                let content = iter.next().expect("no content specified");
+                let content = if let Some(content) = state.get_content(&content.value) {
+                    content
+                } else {
+                    panic!("no content corresponding to {:?}", &content);
+                };
                 return Some(match key {
-                    "align/c"  => Self::c(c),
-                    "align/x"  => Self::x(c),
-                    "align/y"  => Self::y(c),
-                    "align/n"  => Self::n(c),
-                    "align/s"  => Self::s(c),
-                    "align/e"  => Self::e(c),
-                    "align/w"  => Self::w(c),
-                    "align/nw" => Self::nw(c),
-                    "align/ne" => Self::ne(c),
-                    "align/sw" => Self::sw(c),
-                    "align/se" => Self::se(c),
+                    "align/c"  => Self::c(content),
+                    "align/x"  => Self::x(content),
+                    "align/y"  => Self::y(content),
+                    "align/n"  => Self::n(content),
+                    "align/s"  => Self::s(content),
+                    "align/e"  => Self::e(content),
+                    "align/w"  => Self::w(content),
+                    "align/nw" => Self::nw(content),
+                    "align/ne" => Self::ne(content),
+                    "align/sw" => Self::sw(content),
+                    "align/se" => Self::se(content),
                     _ => unreachable!()
                 })
             },
diff --git a/output/src/ops/cond.rs b/output/src/ops/cond.rs
index 5408852..f92f157 100644
--- a/output/src/ops/cond.rs
+++ b/output/src/ops/cond.rs
@@ -22,10 +22,17 @@ impl<A, B> Either<A, B> {
 try_from_expr!(<'a, E>: When<RenderBox<'a, E>>: |state, iter| {
     if let Some(Token { value: Value::Key("when"), .. }) = iter.peek() {
         let _ = iter.next().unwrap();
+
         let condition = iter.next().expect("no condition specified");
-        let content   = iter.next().expect("no content specified");
         let condition = state.get(&condition.value).expect("no condition provided");
-        let content   = state.get_content(&content.value).expect("no content provided");
+
+        let content = iter.next().expect("no content specified");
+        let content = if let Some(content) = state.get_content(&content.value) {
+            content
+        } else {
+            panic!("no content corresponding to for {:?}", &content);
+        };
+
         return Some(Self(condition, content))
     }
 });
@@ -34,12 +41,24 @@ try_from_expr!(<'a, E>: When<RenderBox<'a, E>>: |state, iter| {
 try_from_expr!(<'a, E>: Either<RenderBox<'a, E>, RenderBox<'a, E>>: |state, iter| {
     if let Some(Token { value: Value::Key("either"), .. }) = iter.peek() {
         let _ = iter.next().unwrap();
+
         let condition = iter.next().expect("no condition specified");
-        let content   = iter.next().expect("no content specified");
-        let alternate = iter.next().expect("no alternate specified");
         let condition = state.get(&condition.value).expect("no condition provided");
-        let content   = state.get_content(&content.value).expect("no content provided");
-        let alternate = state.get_content(&alternate.value).expect("no alternate provided");
+
+        let content = iter.next().expect("no content specified");
+        let content = if let Some(content) = state.get_content(&content.value) {
+            content
+        } else {
+            panic!("no content 1 corresponding to {:?}", &content);
+        };
+
+        let alternate = iter.next().expect("no alternate specified");
+        let alternate = if let Some(alternate) = state.get_content(&alternate.value) {
+            alternate
+        } else {
+            panic!("no content 2 corresponding to {:?}", &alternate);
+        };
+
         return Some(Self(condition, content, alternate))
     }
 });
diff --git a/output/src/ops/transform.rs b/output/src/ops/transform.rs
index 6715588..3dd5b6e 100644
--- a/output/src/ops/transform.rs
+++ b/output/src/ops/transform.rs
@@ -90,10 +90,17 @@ macro_rules! transform_xy_unit {
                 if let Some(Token { value: Value::Key(k), .. }) = iter.peek() {
                     if k == $x || k == $y {
                         let _ = iter.next().unwrap();
+
                         let u = iter.next().expect("no unit specified");
-                        let c = iter.next().expect("no content specified");
                         let u = state.get(&u.value).expect("no unit provided");
-                        let c = state.get_content(&c.value).expect("no content provided");
+
+                        let c = iter.next().expect("no content specified");
+                        let c = if let Some(c) = state.get_content(&c.value) {
+                            c
+                        } else {
+                            panic!("no content corresponding to {:?}", &c);
+                        };
+
                         return Some(match k {
                             $x => Self::x(u, c),
                             $y => Self::y(u, c),
@@ -101,12 +108,20 @@ macro_rules! transform_xy_unit {
                         })
                     } else if k == $xy {
                         let _ = iter.next().unwrap();
+
                         let u = iter.next().expect("no unit specified");
+                        let u = state.get(&u.value).expect("no x unit provided");
+
                         let v = iter.next().expect("no unit specified");
+                        let v = state.get(&v.value).expect("no y unit provided");
+
                         let c = iter.next().expect("no content specified");
-                        let u = state.get(&u.value).expect("no unit provided");
-                        let v = state.get(&v.value).expect("no unit provided");
-                        let c = state.get_content(&c.value).expect("no content provided");
+                        let c = if let Some(c) = state.get_content(&c.value) {
+                            c
+                        } else {
+                            panic!("no content corresponding to {:?}", &c);
+                        };
+
                         return Some(Self::xy(u, v, c))
                     }
                 }