+_Basic controls:_
+
+next slide *Enter*, *Space*, *Page Down*, *j*, *l*,
+ *Down Arrow*, *Right Arrow*
+
+previous slide *Backspace*, *Page Up*, *h*, *k*,
+ *Up Arrow*, *Left Arrow*
+
+quit *q*
+reload *r*
+slide N *1..9*
+first slide *Home*
+last slide *End*
+