diff --git a/examples/tty-02-node/src/main.rs b/examples/tty-02-node/src/main.rs
index c3bc61b..7731127 100644
--- a/examples/tty-02-node/src/main.rs
+++ b/examples/tty-02-node/src/main.rs
@@ -29,6 +29,8 @@ async fn main() {
     let ctx = Arc::new(RwLock::new(Context::new()));
 
     nested::editors::char::init_ctx( ctx.clone() );
+    nested::editors::integer::editor::init_ctx( ctx.clone() );
+    nested::editors::list::init_ctx( ctx.clone() );
 
     /* structure of Repr-Tree
      *
@@ -47,12 +49,11 @@ async fn main() {
      *                         /     |      \
      *                       TTY  PixelBuf  SDF
      */
-    let rt_digit = ReprTree::new_arc( Context::parse(&ctx, "<Digit 10>") );
-//    let port_char = r3vi::view::ViewPort::<dyn r3vi::view::singleton::SingletonView<Item = char>>::new();
-    let port_u32 = r3vi::view::ViewPort::<dyn r3vi::view::singleton::SingletonView<Item = u32>>::new();
-    let port_edit = r3vi::view::ViewPort::<dyn r3vi::view::singleton::SingletonView<Item = EditTree>>::new();
-    let port_char_edit = r3vi::view::ViewPort::<dyn r3vi::view::singleton::SingletonView<Item = EditTree>>::new();
+   let rt_digit = ReprTree::new_arc( Context::parse(&ctx, "<Digit 16>") );
 
+    /* add initial representation
+     *  <Digit 16> ~ Char
+     */
     rt_digit.write().unwrap()
         .insert_leaf(
             vec![ Context::parse(&ctx, "Char") ].into_iter(),
@@ -63,93 +64,73 @@ async fn main() {
         .descend(Context::parse(&ctx, "Char")).unwrap().read().unwrap()
         .get_port::<dyn r3vi::view::singleton::SingletonView<Item = char>>().unwrap().0;
 
-    rt_digit.write().unwrap()
-        .insert_leaf(
-            vec![ Context::parse(&ctx, "EditTree") ].into_iter(),
-            port_edit.outer().into()
+    ctx.read().unwrap()
+        .morphisms
+        .morph(
+            rt_digit.clone(),
+            &Context::parse(&ctx, "<Digit 16>~EditTree")
         );
 
-/*
-    let rt_string = ReprTree::new_arc( Context::parse(&ctx, "<Seq Char>") );
+    let port_edit = rt_digit.read().unwrap()
+        .descend(Context::parse(&ctx, "EditTree")).unwrap()
+        .read().unwrap()
+        .get_port::<dyn r3vi::view::singleton::SingletonView<Item = Arc<RwLock<EditTree>> >>().unwrap();
 
-    let vec_string = Arc::new(RwLock::new(Vec::new()));
+    /* setup TTY-Display for DigitEditor
+     */
+    {
+        let et = port_edit.get_view().unwrap().get().clone();
+        let mut et = et.write().unwrap();
+        *et = nested_tty::editors::edittree_make_digit_view(et.clone());
+    }
+
+    //---
+    let rt_string = ReprTree::new_arc( Context::parse(&ctx, "<List <Digit 10>>") );
+    ctx.read().unwrap()
+        .morphisms
+        .morph(
+            rt_string.clone(),
+            &Context::parse(&ctx, "<List <Digit 10>>~EditTree")
+        );
+
+    let editport_string = rt_string.read().unwrap()
+        .descend(Context::parse(&ctx, "EditTree")).unwrap()
+        .read().unwrap()
+        .get_port::<dyn r3vi::view::singleton::SingletonView<Item = Arc<RwLock<EditTree>>> >().unwrap();
+
+    /* setup TTY-Display for ListEditor
+     */
+    {
+        let et = editport_string.get_view().unwrap().get().clone();
+        let mut et = et.write().unwrap();
+        *et = nested_tty::editors::edittree_make_list_edit(et.clone());
+    }
+/*
+    let vec_string = Arc::new(RwLock::new(Vec::<char>::new()));
     
     rt_string.write().unwrap()
         .insert_leaf(
             vec![ Context::parse(&ctx, "<Vec Char>") ].into_iter(),
-            r3vi::view::ViewPort::with_view(vec_string).into_outer()
+            r3vi::view::ViewPort::with_view(vec_string).into_outer().into()
+        );
+
+    
+    rt_string.write().unwrap()
+        .insert_leaf(
+            vec![ Context::parse(&ctx, "EditTree") ].into_iter(),
+            r3vi::view::ViewPort::with_view()
         );
 */
 
-    /* setup projections between representations
-     */
-    eprintln!("rt_digit = {:?}", rt_digit);
-    eprintln!("morph [ Char ==> Char~EditTree ]");
-
-    let rt_char = rt_digit.read().unwrap()
-                .descend(Context::parse(&ctx, "Char"))
-        .unwrap().clone();
-
-    eprintln!("rt_char = {:?}", rt_char);
-
-    ctx.read().unwrap()
-        .morphisms
-        .morph(
-            rt_char.clone(),
-            &Context::parse(&ctx, "Char~EditTree")
-        );
-
-    eprintln!("rt_digit = {:?}", rt_char);
-
-    let edittree_char =
-        ReprTree::descend_ladder(
-            &rt_digit,
-            vec![
-                Context::parse(&ctx, "Char"),
-                Context::parse(&ctx, "EditTree")
-            ].into_iter()
-        ).unwrap()
-        .read().unwrap()
-        .get_view::<dyn r3vi::view::singleton::SingletonView<Item = EditTree>>().unwrap()
-        .get();
-
-    let mut edit_char = edittree_char.get_edit::< nested::editors::char::CharEditor >().unwrap();
-    port_char.attach_to( edit_char.read().unwrap().get_port() );
-
-    let buf_edit_char = r3vi::buffer::singleton::SingletonBuffer::new( edittree_char.clone() );
-    port_char_edit.attach_to( buf_edit_char.get_port() );
-
-    // created by   <Digit 10>   ==>  <Digit 10>~EditTree
-    let mut node_edit_digit =
-        nested::editors::integer::DigitEditor::new(
-            ctx.clone(),
-            16
-        ).into_node(
-            r3vi::buffer::singleton::SingletonBuffer::<usize>::new(0).get_port()
-        );
-
-    node_edit_digit = nested_tty::editors::edittree_make_digit_view( node_edit_digit );
-    let mut edit_digit = node_edit_digit.get_edit::< nested::editors::integer::DigitEditor >().unwrap();
-/*
-    // created by   <Digit 10> ==> <Digit 10>~U32
-    port_u32.attach_to(  port_char.outer().map(|c| c.to_digit(16).unwrap_or(0)) );
- //    port_u32.attach_to( edit_digit.read().unwrap().get_data_port().map(|d| d.unwrap_or(0)) );
-
-    let port_proj_u32_to_char = port_u32.outer().map(|val| char::from_digit(val, 16).unwrap_or('?') );
-     */
-
-    let buf_edit_digit = r3vi::buffer::singleton::SingletonBuffer::new( node_edit_digit );
-    port_edit.attach_to( buf_edit_digit.get_port() );
-
     /* setup terminal
      */
     let app = TTYApplication::new({
         /* event handler
          */
         let ctx = ctx.clone();
-        let node1 = buf_edit_digit.clone();
+        let et1 = editport_string.clone();
         move |ev| {
-            node1.get().send_cmd_obj(ev.to_repr_tree(&ctx));
+            et1.get_view().unwrap().get().write().unwrap().send_cmd_obj(ev.to_repr_tree(&ctx));
         }
     });
 
@@ -165,19 +146,22 @@ async fn main() {
             })
             .offset(Vector2::new(5, 0)),
     );
-    compositor.write().unwrap().push( buf_edit_digit.get().display_view().offset(Vector2::new(0,2)) );
+    compositor.write().unwrap().push( port_edit.get_view().unwrap().get().read().unwrap().display_view().offset(Vector2::new(0,2)) );
 
     let label = ctx.read().unwrap().type_term_to_str(&rt_digit.read().unwrap().get_type());
     compositor
         .write()
         .unwrap()
         .push(nested_tty::make_label(&label).offset(Vector2::new(0, 1)));
-/*
+
+    compositor.write().unwrap().push( editport_string.get_view().unwrap().get().read().unwrap().display_view().offset(Vector2::new(0,4)) );
+
+    let label = ctx.read().unwrap().type_term_to_str(&rt_string.read().unwrap().get_type());
     compositor
         .write()
         .unwrap()
-        .push(node1.display_view().offset(Vector2::new(15, 2)));
-*/
+        .push(nested_tty::make_label(&label).offset(Vector2::new(0, 3)));
+
     /* write the changes in the view of `term_port` to the terminal
      */
     app.show().await.expect("output error!");
diff --git a/lib-nested-core/src/editors/char/mod.rs b/lib-nested-core/src/editors/char/mod.rs
index 7be55a3..3b3c1ff 100644
--- a/lib-nested-core/src/editors/char/mod.rs
+++ b/lib-nested-core/src/editors/char/mod.rs
@@ -37,17 +37,13 @@ pub fn init_ctx( ctx: Arc<RwLock<Context>> ) {
                         ctx.clone(),
                         r3vi::buffer::singleton::SingletonBuffer::<usize>::new(0).get_port()
                     );
-/*
-                    /* setup tty-view for EditTree
-                     */
-                    edittree_char = nested_tty::editors::edittree_make_char_view( edittree_char );
-*/
+
                     /* Insert EditTree into ReprTree
                      */
                     let mut rt = rt.write().unwrap();
                     rt.insert_leaf(
                         vec![ Context::parse(&ctx, "EditTree") ].into_iter(),
-                        SingletonBuffer::new(edittree_char).get_port().into()
+                        SingletonBuffer::new( Arc::new(RwLock::new( edittree_char )) ).get_port().into()
                     );
                 }
             }
diff --git a/lib-nested-core/src/editors/integer/editor.rs b/lib-nested-core/src/editors/integer/editor.rs
index ae4bf9b..0a911c9 100644
--- a/lib-nested-core/src/editors/integer/editor.rs
+++ b/lib-nested-core/src/editors/integer/editor.rs
@@ -22,6 +22,51 @@ use {
     cgmath::{Point2}
 };
 
+
+pub fn init_ctx( ctx: Arc<RwLock<Context>> ) {
+
+    // todo: proper scoping of Radix variable
+    ctx.write().unwrap().add_varname("Radix");
+    let morphtype =
+            crate::repr_tree::MorphismType {
+                src_type: Context::parse(&ctx, "<Digit Radix>"),
+                dst_type: Context::parse(&ctx, "<Digit Radix>~EditTree")
+            };
+
+    ctx.write().unwrap()
+        .morphisms
+        .add_morphism(
+            morphtype,
+            {
+                let ctx = ctx.clone();
+                move |rt, σ| {
+                    let radix =
+                        match σ.get( &laddertypes::TypeID::Var(ctx.read().unwrap().get_var_typeid("Radix").unwrap()) ) {
+                            Some(TypeTerm::Num(n)) => *n as u32,
+                            _ => 0
+                        };
+
+                    /* Create EditTree object
+                     */
+                    let mut edittree_digit = DigitEditor::new(
+                        ctx.clone(),
+                        radix
+                    ).into_node(
+                        r3vi::buffer::singleton::SingletonBuffer::<usize>::new(0).get_port()
+                    );
+
+                    /* Insert EditTree into ReprTree
+                     */
+                    let mut rt = rt.write().unwrap();
+                    rt.insert_leaf(
+                        vec![ Context::parse(&ctx, "EditTree") ].into_iter(),
+                        SingletonBuffer::new( Arc::new(RwLock::new(edittree_digit)) ).get_port().into()
+                    );
+                }
+            }
+        );
+}
+
 //<<<<>>>><<>><><<>><<<*>>><<>><><<>><<<<>>>>
 
 pub struct DigitEditor {
diff --git a/lib-nested-core/src/editors/list/ctx.rs b/lib-nested-core/src/editors/list/ctx.rs
index 8cb8c37..90ef8c5 100644
--- a/lib-nested-core/src/editors/list/ctx.rs
+++ b/lib-nested-core/src/editors/list/ctx.rs
@@ -1,5 +1,5 @@
 use {
-    r3vi::{view::{OuterViewPort, singleton::*}},
+    r3vi::{view::{OuterViewPort, singleton::*}, buffer::singleton::*},
     laddertypes::{TypeTerm},
     crate::{
         repr_tree::{Context},
@@ -10,10 +10,43 @@ use {
 
 //<<<<>>>><<>><><<>><<<*>>><<>><><<>><<<<>>>>
 
-pub fn init_ctx(ctx: &mut Context) {
+pub fn init_ctx(ctx: Arc<RwLock<Context>>) {
+
+    ctx.write().unwrap().add_varname("Item");
+    let mt = crate::repr_tree::MorphismType {
+        src_type: Context::parse(&ctx, "<List Item>"),
+        dst_type: Context::parse(&ctx, "<List Item>~EditTree")
+    };
+    ctx.write().unwrap().morphisms.add_morphism(
+        mt,
+        {
+            let ctx = ctx.clone();
+            move |rt, σ| {
+                let item_id = laddertypes::TypeID::Var( ctx.read().unwrap().get_var_typeid("Item").unwrap() );
+                if let Some( item_type ) = σ.get( &item_id ) {
+                    eprintln!("create list of {:?}", item_type);
+                    let mut edittree_list = ListEditor::new(
+                        ctx.clone(),
+                        item_type.clone()
+                    ).into_node(
+                        r3vi::buffer::singleton::SingletonBuffer::<usize>::new(0).get_port()
+                    );
+
+                    let mut rt = rt.write().unwrap();
+                    rt.insert_leaf(
+                        vec![ Context::parse(&ctx, "EditTree") ].into_iter(),
+                        SingletonBuffer::new( Arc::new(RwLock::new( edittree_list )) ).get_port().into()
+                    );
+                } else {
+                    eprintln!("no item type");
+                }
+            }
+        }
+    );
+/*
+    
     ctx.add_typename("ListCmd".into());
     ctx.add_list_typename("List".into());
-/*
     ctx.add_node_ctor(
         "List", Arc::new(
             |ctx: Arc<RwLock<Context>>, ty: TypeTerm, depth: OuterViewPort<dyn SingletonView<Item = usize>>| {
diff --git a/lib-nested-tty/src/editors/mod.rs b/lib-nested-tty/src/editors/mod.rs
index 5d65af6..4e2e30a 100644
--- a/lib-nested-tty/src/editors/mod.rs
+++ b/lib-nested-tty/src/editors/mod.rs
@@ -61,21 +61,21 @@ pub fn edittree_make_digit_view(
 
     node
 }
-
 /*
-pub fn node_make_seq_view(
-    mut node: NestedNode
-) -> NestedNode {
+pub fn edittree_make_seq_view(
+    mut node: EditTree
+) -> EditTree {
     node.disp.view
         .write().unwrap()
         .insert_branch(ReprTree::new_leaf(
             Context::parse(&node.ctx, "TerminalView"),
-            node.data
-                .read()
+            node.get_edit::< nested::editors::list::ListEditor >()
                 .unwrap()
-                .get_port::<dyn SequenceView<Item = NestedNode>>()
-                .expect("unable to get Seq-view")
-                .map(move |char_node| node_make_tty_view(char_node.clone()).display_view() )
+                .read().unwrap()
+                .get_data_port()
+                .map(move |item_edittree|
+                    edittree_make_tty_view( item_edittree ).display_view()
+                )
                 .wrap(make_label("("), make_label(")"))
                 .to_grid_horizontal()
                 .flatten()
@@ -83,24 +83,25 @@ pub fn node_make_seq_view(
         ));
     node
 }
+*/
 
-pub fn node_make_list_edit(
-    mut node: NestedNode
-) -> NestedNode {
+pub fn edittree_make_list_edit(
+    mut node: EditTree
+) -> EditTree {
     list::PTYListStyle::for_node( &mut node, ("(", "", ")") );
     list::PTYListController::for_node( &mut node, None, None );
 
     node
 }
-
-pub fn node_make_tty_view(
-    node: NestedNode
-) -> NestedNode {
-    if node.data.read().unwrap().get_type() == &Context::parse(&node.ctx, "Char") {
+/*
+pub fn edittree_make_tty_view(
+    et: EditTree
+) -> EditTree {
+    if et.data.read().unwrap().get_type() == &Context::parse(&node.ctx, "Char") {
         node_make_char_view( node )
-    } else if node.data.read().unwrap().get_type() == &Context::parse(&node.ctx, "<Seq Char>") {
+    } else if et.data.read().unwrap().get_type() == &Context::parse(&node.ctx, "<Seq Char>") {
         node_make_seq_view( node )
-    } else if node.data.read().unwrap().get_type() == &Context::parse(&node.ctx, "<List Char>") {
+    } else if et.data.read().unwrap().get_type() == &Context::parse(&node.ctx, "<List Char>") {
         node_make_list_edit( node )
     } else {
         eprintln!("couldnt add view");
diff --git a/lib-nested-tty/src/lib.rs b/lib-nested-tty/src/lib.rs
index 07f49f6..f5631af 100644
--- a/lib-nested-tty/src/lib.rs
+++ b/lib-nested-tty/src/lib.rs
@@ -56,10 +56,10 @@ impl DisplaySegment for nested::edit_tree::EditTree {
                 }
                 
                 else {
-                make_label("?")
+                make_label("# could not get ViewPort #")
             }
         } else {
-            make_label("?")
+            make_label("# No TTY View available #")
             .map_item(|_p,a| a.add_style_back(TerminalStyle::fg_color((220, 30, 30))))
         }
     }