Clarify use of 'optran' command

README.optran

@@ -12,12 +12,28 @@ If this fails:
 
 If this again fails, bail out.
 
+Step 1 may be skipped by
+option noopiter
+
+Step 2 may be skipped by
+option gminsteps=0
+
+Step 3 may be skipped by 
+option srcsteps=0
+
 In this branch a fourth method is added:
 4) Start a transient simulation for a specific amount of time.
    Keep all data local. Keep the matrix values as an
    operating point for the simulation following.
 If this fails, finally stop.
 
+Operating point by transient is initiated by the command 'optran'.
+The first three entries will override noopiter, gminsteps, srcsteps.
+A typical command may be
+optran 0 0 0 50u 10m 0
+(no initial iteration, no gmin stepping, no source stepping,
+stepsize for optran 50 us, optran run until 10 ms, no supply ramping
+
 The time for transient is determined a priori. If a transient
 simulation follows, choose 100 time the TSTEP value. If an ac
 or noise simulation follows, take the inverted starting
@@ -26,14 +42,7 @@ frequency divided by 10 as the optran simulation time.
 A method to stop the op transient simulation, when all nodes
 have become stable, might be desirable, but has not yet been implemented.
 
-Step 1 may be skipped by
-option noopiter
-
-Step 2 may be skipped by
-option gminsteps=0
 
-Step 3 may be skipped by 
-option srcsteps=0
 
 The transient op calculation uses the 'UIC' flag for its startup.
 Basically two applications come to mind: You may use this with