diff --git a/bin/curvecalc b/bin/curvecalc
--- a/bin/curvecalc
+++ b/bin/curvecalc
@@ -269,7 +269,11 @@ def savekey(*args):
 root.bind("<Control-Key-s>",savekey)
 
 create_status_lines(root)
-    
+for helpline in ["Bindings: C-s save subterms; B1 drag point; C-B1 curve add point; 1..5 add point at time; Esc see current time; Mousewheel zoom",
+                 "Available in functions: nsin/ncos period=amp=1; within(a,b) bef(x) aft(x) compare to time; smoove(x) cubic smoothstep; curvename(t) eval curve"]:
+    tk.Label(root,text=helpline, font="Helvetica -12 italic",
+             anchor='w').pack(side='top',fill='x')
+
 recent_t=[]
 later = None
 def update():