diff --git a/doc/display.mac b/doc/display.mac
index 13d6d677c50b492d78973169d4062d37bf8255bc..a89c0f75761fb88fa24ba10a97fdfdfdd859752e 100644
--- a/doc/display.mac
+++ b/doc/display.mac
@@ -1,6 +1,6 @@
 /vis/scene/create
 /vis/scene/add/hits
 /vis/scene/add/trajectories
-/vis/open OGLSX
-/vis/viewer/panTo 0 0 
-
+/vis/open OGLIX
+#/vis/viewer/panTo 0 0 
+/vis/viewer/zoom 2.4
diff --git a/doc/particle_gun.mac b/doc/particle_gun.mac
index b10856c0b6db881003e021078ca58610b65b7a14..5d0aa218c5117681ee0d8d713284357a288b3f31 100644
--- a/doc/particle_gun.mac
+++ b/doc/particle_gun.mac
@@ -1,4 +1,4 @@
-##/generator/select gun
+#/generator/select gun
 /gun/pos/type Point
 /gun/pos/centre 0. 0. 0.
 /gun/ang/type iso
diff --git a/doc/slic_particle_gun.mac b/doc/slic_particle_gun.mac
new file mode 100644
index 0000000000000000000000000000000000000000..0f43227dd119baadd414aac0e7ca0661b9da7ea7
--- /dev/null
+++ b/doc/slic_particle_gun.mac
@@ -0,0 +1,15 @@
+/generator/select gps
+/gps/verbose 2
+
+/gps/pos/type Volume
+/gps/pos/shape Cylinder
+/gps/pos/centre 0. 0. 0. cm
+/gps/pos/radius 6.360 m
+/gps/pos/halfz 4.95 m
+
+# confine by volume
+#/gps/pos/confine det_envelope
+/gps/ene/type Mono
+/gps/ene/mono 10 GeV
+/gps/particle mu-
+/gps/direction 0 1 0