diff --git a/CLAUDE.md b/CLAUDE.md
index 9bd9735..55219a7 100644
--- a/CLAUDE.md
+++ b/CLAUDE.md
@@ -205,7 +205,7 @@ Tests import `bubbletea` directly to send messages (e.g., `keyMsg()`) to the mod
 
 `View()` dispatches by `m.mode` to the per-mode renderer. Each renderer follows the same shape: header, divider, body lines (sliced through `clampOffset` + `sliceLines` from `viewport.go`), divider, footer. The `?` help overlay short-circuits the entire view.
 
-Every mode has dedicated `render*Header` and `render*Footer` functions (no inline header/footer construction inside the View renderer). Footer hints follow a uniform `key action` format separated by three spaces; sub-views all show `q/esc/h/← back`, while the list shows `q quit`. Flash messages are rendered through one path in every footer (precedence over hints).
+Every mode has dedicated `render*Header` and `render*Footer` functions (no inline header/footer construction inside the View renderer). Footer hints follow a uniform `key action` format separated by three spaces; every footer includes `? help` so the overlay is discoverable; sub-views also show `q/esc/h/← back`, while the list shows `q quit`. Flash messages are rendered through one path in every footer (precedence over hints).
 
 Styling is done via Lipgloss `NewStyle()` instances defined at the top of `render.go`. Layout constants (`projectColWidth`, `branchColWidth`, `fixedCols`, `rerunMaxLines`, `snippetMaxLen`) are package-level so list and search rows render identical column widths.
 
diff --git a/footer_completeness_test.go b/footer_completeness_test.go
new file mode 100644
index 0000000..7b780aa
--- /dev/null
+++ b/footer_completeness_test.go
@@ -0,0 +1,146 @@
+package lore
+
+// footer_completeness_test.go: every mode's footer must show ? help and the
+// keys that are absent from the current footer strings but present in the
+// help overlay (renderHelpOverlay).
+
+import (
+	"strings"
+	"testing"
+	"time"
+)
+
+// TestAllFooters_HaveHelpHint ensures every mode's steady-state footer shows
+// "? help" so users can discover the help overlay.
+func TestAllFooters_HaveHelpHint(t *testing.T) {
+	cases := []struct {
+		name string
+		get  func() string
+	}{
+		{
+			name: "list",
+			get: func() string {
+				m := loadedModelWith(Session{Project: "p", Slug: "s1", Timestamp: time.Now()})
+				m.width = 220
+				m.height = 40
+				return renderListFooter(m)
+			},
+		},
+		{
+			name: "detail",
+			get: func() string {
+				m := loadedModel("a")
+				m.mode = modeDetail
+				m.detailSession = Session{Slug: "x", Project: "p", Branch: "b", Timestamp: time.Now()}
+				m.turns = []turn{{kind: "user", body: "hi"}}
+				m.expandedTurns = make(map[int]bool)
+				m.width = 220
+				m.height = 40
+				return renderDetailFooter(m)
+			},
+		},
+		{
+			name: "search results",
+			get: func() string {
+				m := newModel("/d")
+				m.mode = modeSearch
+				m.searchMode = searchModeResults
+				m.searchQuery = "x"
+				m.width = 220
+				m.height = 40
+				return renderSearchFooter(m)
+			},
+		},
+		{
+			name: "project",
+			get: func() string {
+				m := newModel("/d")
+				m.mode = modeProject
+				m.projectCWD = "/x/p"
+				m.width = 220
+				m.height = 40
+				return renderProjectFooter(m)
+			},
+		},
+		{
+			name: "rerun",
+			get: func() string {
+				m := newModel("/d")
+				m.mode = modeRerun
+				m.detailSession = Session{Slug: "x"}
+				m.rerunPrompt = "hi"
+				m.rerunCWD = "/x"
+				m.width = 220
+				m.height = 40
+				return renderRerunFooter(m)
+			},
+		},
+		{
+			name: "stats",
+			get: func() string {
+				m := loadedModelWith(Session{Project: "p", Slug: "s1", Timestamp: time.Now()})
+				m.mode = modeStats
+				m.statsData = []statsRow{}
+				m.width = 220
+				m.height = 40
+				return renderStatsFooter(m)
+			},
+		},
+		{
+			name: "timeline",
+			get: func() string {
+				m := newModel("/d")
+				m.mode = modeTimeline
+				m.width = 220
+				m.height = 40
+				return renderTimelineFooter(m)
+			},
+		},
+	}
+
+	for _, tc := range cases {
+		t.Run(tc.name, func(t *testing.T) {
+			out := tc.get()
+			if !strings.Contains(out, "?") {
+				t.Errorf("%s footer missing '?' help hint:\n%s", tc.name, out)
+			}
+		})
+	}
+}
+
+// TestListFooter_HasBookmarkAndTimelineHints checks that m (bookmark toggle),
+// M (bookmark-only filter), and T (timeline) are all shown in the default
+// list footer. These are first-class features that users should be able to
+// discover without pressing ?.
+func TestListFooter_HasBookmarkAndTimelineHints(t *testing.T) {
+	m := loadedModelWith(Session{Project: "p", Slug: "s1", Timestamp: time.Now()})
+	m.width = 220
+	m.height = 40
+	out := renderListFooter(m)
+
+	for _, want := range []string{"m bookmark", "M bookmarks", "T timeline"} {
+		if !strings.Contains(out, want) {
+			t.Errorf("list footer missing %q:\n%s", want, out)
+		}
+	}
+}
+
+// TestDetailFooter_HasBookmarkAndSearchHints checks that m (bookmark) and /
+// (search) appear in the detail footer. Both are shown in the help overlay
+// but were absent from the footer hint bar.
+func TestDetailFooter_HasBookmarkAndSearchHints(t *testing.T) {
+	m := loadedModel("a")
+	m.mode = modeDetail
+	m.detailSession = Session{Slug: "x", Project: "p", Branch: "b", Timestamp: time.Now()}
+	m.turns = []turn{{kind: "user", body: "hi"}}
+	m.expandedTurns = make(map[int]bool)
+	m.width = 220
+	m.height = 40
+	out := renderDetailFooter(m)
+
+	for _, want := range []string{"m bookmark", "/ search"} {
+		if !strings.Contains(out, want) {
+			t.Errorf("detail footer missing %q:\n%s", want, out)
+		}
+	}
+}
diff --git a/project.go b/project.go
index 31e7866..5801cc4 100644
--- a/project.go
+++ b/project.go
@@ -140,5 +140,5 @@ func renderProjectFooter(m model) string {
 	if m.flashMsg != "" {
 		return flashStyle.Render(" " + m.flashMsg)
 	}
-	return footerStyle.Render(" j/k move   d/u page   enter open   g/G top/bottom   q/esc/h/← back")
+	return footerStyle.Render(" j/k move   d/u page   enter open   g/G top/bottom   ? help   q/esc/h/← back")
 }
diff --git a/render.go b/render.go
index 772648f..4fca4d2 100644
--- a/render.go
+++ b/render.go
@@ -325,7 +325,7 @@ func renderDetailFooter(m model) string {
 		copyStatus = "  ✓ copied"
 	}
 	return footerStyle.Render(fmt.Sprintf(
-		" j/k move   d/u page   g/G top/bottom   space expand   y copy   r run   q/esc/h/← back%s",
+		" j/k move   d/u page   g/G top/bottom   space expand   y copy   r run   m bookmark   / search   ? help   q/esc/h/← back%s",
 		copyStatus))
 }
 
@@ -421,7 +421,7 @@ func renderListFooter(m model) string {
 			return footerStyle.Render(fmt.Sprintf(" fuzzy filter: %s   j/k · enter open · esc clear   q quit", m.filterText))
 		}
 	}
-	return footerStyle.Render(" j/k move   d/u page   enter open   / search   p filter project   b filter branch   f fuzzy   P project view   S usage stats   g/G top/bottom   q quit")
+	return footerStyle.Render(" j/k move   d/u page   enter open   / search   p project   b branch   f fuzzy   m bookmark   M bookmarks   T timeline   P project view   S stats   g/G top/bottom   ? help   q quit")
 }
 
 // padTrunc trims s to max display columns or right-pads it to fit.
@@ -527,7 +527,7 @@ func renderSearchFooter(m model) string {
 	if m.searchMode == searchModeEntry {
 		return footerStyle.Render(" search: " + m.searchQuery + "_   [enter] run   [esc] cancel")
 	}
-	return footerStyle.Render(" j/k move   d/u page   enter open   / new search   g/G top/bottom   q/esc/h/← back")
+	return footerStyle.Render(" j/k move   d/u page   enter open   / new search   g/G top/bottom   ? help   q/esc/h/← back")
 }
 
 // ----- re-run -----
@@ -585,7 +585,7 @@ func renderRerunFooter(m model) string {
 	if m.flashMsg != "" {
 		return flashStyle.Render(" " + m.flashMsg)
 	}
-	return footerStyle.Render(" enter run   q/esc/h/← back")
+	return footerStyle.Render(" enter run   ? help   q/esc/h/← back")
 }
 
 // extractToolName extracts the tool name from the tool body string.
@@ -928,7 +928,7 @@ func renderStatsFooter(m model) string {
 	if m.flashMsg != "" {
 		return flashStyle.Render(" " + m.flashMsg)
 	}
-	return footerStyle.Render(" j/k move   d/u page   g/G top/bottom   q/esc/h/← back")
+	return footerStyle.Render(" j/k move   d/u page   g/G top/bottom   ? help   q/esc/h/← back")
 }
 
 // ----- timeline mode -----
@@ -973,7 +973,7 @@ func renderTimelineFooter(m model) string {
 	hm := buildHeatmap(m.sessions, time.Now())
 	count := hm.countOn(m.timelineCursor)
 	dateStr := m.timelineCursor.Format("2006-01-02 (Mon)")
-	hint := footerStyle.Render(" h/← l/→ move day   enter filter list   q/esc back")
+	hint := footerStyle.Render(" h/← l/→ move day   enter filter list   ? help   q/esc back")
 	info := footerStyle.Render(fmt.Sprintf(" %s   %d session%s", dateStr, count, plural(count)))
 	return info + "\n" + hint
 }
diff --git a/render_test.go b/render_test.go
index d68b9dd..4cb3997 100644
--- a/render_test.go
+++ b/render_test.go
@@ -183,11 +183,11 @@ func TestRenderFooter_DefaultFooter(t *testing.T) {
 	if !strings.Contains(out, "j/k move") {
 		t.Errorf("default footer missing 'j/k move':\n%s", out)
 	}
-	if !strings.Contains(out, "p filter project") {
-		t.Errorf("default footer missing 'p filter project':\n%s", out)
+	if !strings.Contains(out, "p project") {
+		t.Errorf("default footer missing 'p project':\n%s", out)
 	}
-	if !strings.Contains(out, "b filter branch") {
-		t.Errorf("default footer missing 'b filter branch':\n%s", out)
+	if !strings.Contains(out, "b branch") {
+		t.Errorf("default footer missing 'b branch':\n%s", out)
 	}
 }