diff --git a/src/command/keymap.rs b/src/command/keymap.rs
index e84357e..d5564c7 100644
--- a/src/command/keymap.rs
+++ b/src/command/keymap.rs
@@ -266,10 +266,14 @@ impl KeymapSet {
         normal.bind(KeyCode::Char('G'), none, "jump-last-row");
         normal.bind(KeyCode::Char('0'), none, "jump-first-col");
         normal.bind(KeyCode::Char('$'), none, "jump-last-col");
+        normal.bind(KeyCode::Home, none, "jump-first-col");
+        normal.bind(KeyCode::End, none, "jump-last-col");
 
         // Scroll
         normal.bind_args(KeyCode::Char('d'), ctrl, "scroll-rows", vec!["5".into()]);
         normal.bind_args(KeyCode::Char('u'), ctrl, "scroll-rows", vec!["-5".into()]);
+        normal.bind_args(KeyCode::PageDown, none, "page-scroll", vec!["1".into()]);
+        normal.bind_args(KeyCode::PageUp, none, "page-scroll", vec!["-1".into()]);
 
         // Cell operations
         normal.bind(KeyCode::Char('x'), none, "clear-cell");
@@ -357,7 +361,7 @@ impl KeymapSet {
         // Drill into aggregated cell / view history / add row
         normal.bind(KeyCode::Char('>'), none, "drill-into-cell");
         normal.bind(KeyCode::Char('<'), none, "view-back");
-        normal.bind(KeyCode::Char('o'), none, "add-record-row");
+        normal.bind(KeyCode::Char('o'), none, "open-record-row");
 
         // Records mode toggle and prune toggle
         normal.bind(KeyCode::Char('R'), none, "toggle-records-mode");
@@ -560,6 +564,7 @@ impl KeymapSet {
         let mut ed = Keymap::new();
         ed.bind_args(KeyCode::Esc, none, "enter-mode", vec!["normal".into()]);
         ed.bind(KeyCode::Enter, none, "commit-cell-edit");
+        ed.bind(KeyCode::Tab, none, "commit-and-advance-right");
         ed.bind_args(KeyCode::Backspace, none, "pop-char", vec!["edit".into()]);
         ed.bind_any_char("append-char", vec!["edit".into()]);
         set.insert(ModeKey::Editing, Arc::new(ed));
diff --git a/src/format.rs b/src/format.rs
new file mode 100644
index 0000000..ed31509
--- /dev/null
+++ b/src/format.rs
@@ -0,0 +1,50 @@
+use crate::model::cell::CellValue;
+
+/// Format a CellValue for display with number formatting options.
+pub fn format_value(v: Option<&CellValue>, comma: bool, decimals: u8) -> String {
+    match v {
+        Some(CellValue::Number(n)) => format_f64(*n, comma, decimals),
+        Some(CellValue::Text(s)) => s.clone(),
+        None => String::new(),
+    }
+}
+
+/// Parse a number format string like ",.0" into (use_commas, decimal_places).
+pub fn parse_number_format(fmt: &str) -> (bool, u8) {
+    let comma = fmt.contains(',');
+    let decimals = fmt
+        .rfind('.')
+        .and_then(|i| fmt[i + 1..].parse::<u8>().ok())
+        .unwrap_or(0);
+    (comma, decimals)
+}
+
+/// Format an f64 with optional comma grouping and decimal places.
+pub fn format_f64(n: f64, comma: bool, decimals: u8) -> String {
+    let formatted = format!("{:.prec$}", n, prec = decimals as usize);
+    if !comma {
+        return formatted;
+    }
+    let (int_part, dec_part) = if let Some(dot) = formatted.find('.') {
+        (&formatted[..dot], Some(&formatted[dot..]))
+    } else {
+        (&formatted[..], None)
+    };
+    let is_neg = int_part.starts_with('-');
+    let digits = if is_neg { &int_part[1..] } else { int_part };
+    let mut result = String::new();
+    for (idx, c) in digits.chars().rev().enumerate() {
+        if idx > 0 && idx % 3 == 0 {
+            result.push(',');
+        }
+        result.push(c);
+    }
+    if is_neg {
+        result.push('-');
+    }
+    let mut out: String = result.chars().rev().collect();
+    if let Some(dec) = dec_part {
+        out.push_str(dec);
+    }
+    out
+}
diff --git a/src/main.rs b/src/main.rs
index b1d1adf..642f343 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -1,5 +1,6 @@
 mod command;
 mod draw;
+mod format;
 mod formula;
 mod import;
 mod model;