diff --git a/trailer.html b/trailer.html
index f413285..695edf0 100644
--- a/trailer.html
+++ b/trailer.html
@@ -892,7 +892,8 @@
         + '<textarea rows="5" style="width:100%;font-size:12px;margin-top:6px" data-propdesc="' + esc(p.id) + '">'
         + esc(p.description || "") + '</textarea>'
         + (busy ? '' : '<div class="tools" style="margin-top:6px">'
-          + '<button type="button" class="btn" data-propsave="' + esc(p.id) + '">Draw it from this description &middot; $'
+          + '<button type="button" class="btn" data-propsave="' + esc(p.id) + '" title="Saves the description and the list of shots. The picture is drawn again only if the description changed.">Save</button>'
+          + '<button type="button" class="btn" data-propsave="' + esc(p.id) + '" data-again="1">Draw its picture again &middot; $'
           + (p.kind === "vehicle" ? "0.14" : "0.07") + '</button>'
           + (drawn ? '<button type="button" class="btn" data-propshots="' + esc(p.id) + '">Redraw the ' + drawn
             + ' shot' + (drawn === 1 ? '' : 's') + ' that show it &middot; $' + (drawn * 0.14).toFixed(2) + '</button>' : '')
@@ -1551,8 +1552,10 @@
       el.disabled = true;
       var psl = document.querySelector('[data-propshotlist="' + ppid + '"]');
       r = await act("set_prop", { draft_id: CUR, prop_id: ppid, description: pta ? pta.value : "",
-                                  shots: psl ? psl.value : null, force: true });
-      if (r) { showMsg("msg", "Drawing the reference picture, about $" + r.usd + ". When it looks right, redraw the shots that show it.", "ok"); await refresh(); }
+                                  shots: psl ? psl.value : null, force: !!el.getAttribute("data-again") });
+      if (r) { showMsg("msg", el.getAttribute("data-again")
+          ? "Drawing the reference picture again, about $" + r.usd + ". When it looks right, redraw the shots that show it."
+          : "Saved. If you changed the description its picture is being drawn again.", "ok"); await refresh(); }
       return;
     }
     if ((el = hit("data-propshots"))) {