+.B \-db
+.B \-no\-db
+Use double-buffering (or not, respectively). Double-buffering may make
+things look better for larger line widths and/or larger numbers of
+blots, but "better" may equate to yielding less of the desired edginess
+effect. You'll be calmer after watching the double-buffered variant;
+you're more likely to go into epileptic fits with it off. Hence, it
+is off (false) by default, resource \fIdoubleBuffer\fP.
+.TP 8