diff --git a/docs/manual/README.md b/docs/manual/README.md
index 429ed96..d8fa1b1 100644
--- a/docs/manual/README.md
+++ b/docs/manual/README.md
@@ -273,13 +273,16 @@ sensor does not. The list opens over the column and scrolls on its own — by
 wheel, drag or flick, or with `Up`, `Down` and `Enter` — down to the
 black-and-white stocks at its end.
 
+![Opening the film list, scrolling it, choosing Velvia, then holding Before](media/film.gif)
+
 The film's sliders work on a mask as they do on the whole photograph, the way
-a printer dodges and burns: in a layer, `Print exposure` darkens or lightens
+a printer dodges and burns: in a layer, `Print Exposure` darkens or lightens
 that region of the print, `Push` develops it further, and the stock stays the
 one the photograph was made on. Where layers overlap, the photograph takes the
-average of what they ask for.
+average of what they ask for. Below, a negative stock on an alpine frame, then
+a gradient over the sky whose `Print Exposure` burns it in.
 
-![Opening the film list, scrolling it, choosing Velvia, then holding Before](media/film.gif)
+![Kodak Ektar 100 on the whole frame, a gradient turned to cover the sky, its Print Exposure raised to burn the sky in, then holding Before](media/film-local.gif)
 
 ### History, snapshots, presets
 
diff --git a/docs/manual/index.html b/docs/manual/index.html
index 617db0f..2c4f4bb 100644
--- a/docs/manual/index.html
+++ b/docs/manual/index.html
@@ -332,12 +332,14 @@ named stock; below it, the print exposure and push controls a film has and a
 sensor does not. The list opens over the column and scrolls on its own — by
 wheel, drag or flick, or with <code>Up</code>, <code>Down</code> and <code>Enter</code> — down to the
 black-and-white stocks at its end.</p>
+<figure><img loading="lazy" src="media/film.gif" alt="Opening the film list, scrolling it, choosing Velvia, then holding Before"><figcaption>Opening the film list, scrolling it, choosing Velvia, then holding Before</figcaption></figure>
 <p>The film's sliders work on a mask as they do on the whole photograph, the way
-a printer dodges and burns: in a layer, <code>Print exposure</code> darkens or lightens
+a printer dodges and burns: in a layer, <code>Print Exposure</code> darkens or lightens
 that region of the print, <code>Push</code> develops it further, and the stock stays the
 one the photograph was made on. Where layers overlap, the photograph takes the
-average of what they ask for.</p>
-<figure><img loading="lazy" src="media/film.gif" alt="Opening the film list, scrolling it, choosing Velvia, then holding Before"><figcaption>Opening the film list, scrolling it, choosing Velvia, then holding Before</figcaption></figure>
+average of what they ask for. Below, a negative stock on an alpine frame, then
+a gradient over the sky whose <code>Print Exposure</code> burns it in.</p>
+<figure><img loading="lazy" src="media/film-local.gif" alt="Kodak Ektar 100 on the whole frame, a gradient turned to cover the sky, its Print Exposure raised to burn the sky in, then holding Before"><figcaption>Kodak Ektar 100 on the whole frame, a gradient turned to cover the sky, its Print Exposure raised to burn the sky in, then holding Before</figcaption></figure>
 <h3 id="history-snapshots-presets">History, snapshots, presets</h3>
 <p>Every change is a step; <code>Undo</code> and the History panel walk them. <code>Snapshot</code>
 keeps the current state under a name. <code>Presets…</code> saves the settings to
diff --git a/docs/manual/media/film-local.gif b/docs/manual/media/film-local.gif
new file mode 100644
index 0000000..a020b93
--- /dev/null
+++ b/docs/manual/media/film-local.gif
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:6385b8746474faca6467b31a812e1b0db8987ba25c76f82ff5e0e6a846f35c07
+size 2052473
diff --git a/tools/manual/scenes.py b/tools/manual/scenes.py
index 9e90f30..c8bad43 100755
--- a/tools/manual/scenes.py
+++ b/tools/manual/scenes.py
@@ -57,6 +57,7 @@ TEAPOT = '_MG_4918'
 PANO_FIRST, PANO_LAST = '_MG_8320', '_MG_8331'
 NY_FIRST, NY_LAST = '_MG_8393', '_MG_8397'
 ALPS_ROW = ['_MG_8322', '_MG_8328']   # the second row of the alps, first and last
+ALPS_SKY = '_MG_8330'       # an upright alpine frame, its top third sky and cloud
 TOWER = '_MG_8693'          # towers shot looking up: verticals that converge
 ROAD = '_MG_8672'           # a road under a sky, with marks on it: masks and repair
 ROAD_MARK = (0.305, 0.794)  # a dark mark on its tarmac
@@ -1005,6 +1006,64 @@ def film():
     undo_all()
 
 
+FILM_LOCAL = 'Kodak Ektar 100'   # a negative, so it is printed and has a print exposure
+
+
+def choose_film(stock):
+    """`stock` chosen from the film list, which is open at its top."""
+    px, py, _, _ = film_list_origin()
+    vx0, vy0, vx1, vy1 = dr.rect(f'{stock}@Text')
+    dr.click(px + (vx0 + vx1) // 2, py + (vy0 + vy1) // 2)
+    pause(3)
+
+
+def gradient_over_top(to_fy):
+    """The linear gradient just added, turned to fall from the top of the
+    frame and its middle moved to `to_fy`. A new one is laid across the
+    middle facing right, its rotate handle below the centre: that handle,
+    dragged round to the right, turns it a quarter to face up."""
+    cx, cy = dr.photo(0.5, 0.5)
+    handles = [(int(h['x'] + h['w'] / 2), int(h['y'] + h['h'] / 2))
+               for h in dr.matches('id:GradientHandles::drag')]
+    rx, ry = max(handles, key=lambda p: p[1])
+    dr.drag(rx, ry, cx + (ry - cy), cy, 25)
+    pause(1.0)
+    dr.drag(cx, cy, *dr.photo(0.5, to_fy), 25)
+    pause(1.2)
+
+
+@scene(media=['film-local.gif'], sources=MASK_SRC + ['core/dr-film/src/**', 'core/dr-pipeline/src/ops/film_sim.rs'])
+def film_local():
+    """A negative stock on the whole photograph, then a gradient over the
+    sky whose Print Exposure burns it in, as a printer would under the
+    enlarger, the mask drawn as its edge so the print shows through; Done
+    Masking, then Before held."""
+    at_develop(ALPS_SKY)
+    in_column('Film@Button')
+    film_list_open()
+    choose_film(FILM_LOCAL)
+    tool('Local')
+    rec('film-local')
+    pause(0.6)
+    dr.click(*in_column('Linear@Button'))
+    pause(1.5)
+    gradient_over_top(0.36)
+    dr.click(*in_column('Edge@RadioButton'))   # an outline, so the tint hides nothing
+    pause(1.2)
+    slide('Print Exposure', 28, 30)
+    pause(2.0)
+    dr.click_on('Done Masking@Button')
+    pause(2.0)
+    hold_before(1.6)
+    pause(1.0)
+    cut()
+    tool('Local')           # masks shown tinted again, as the other scenes
+    dr.click(*in_column('Tint@RadioButton'))    # expect; offered while one exists
+    pause(0.6)
+    tool('Photo')
+    undo_all()
+
+
 FILM_LAST = 'Ilford HP5 Plus'   # the last stock `DevelopSession::film_choices` lists
 FILM_ROWS = 28                  # None and the 27 camera stocks
 FILM_ROW, FILM_LIST_MAX = 32, 320