diff --git a/nats.go b/nats.go
index f91445842..81f51335f 100644
--- a/nats.go
+++ b/nats.go
@@ -331,10 +331,12 @@ type Options struct {
 	// MaxReconnect sets the number of reconnect attempts that will be
 	// tried before giving up. If negative, then it will never give up
 	// trying to reconnect.
+	// Defaults to 60.
 	MaxReconnect int
 
 	// ReconnectWait sets the time to backoff after attempting a reconnect
 	// to a server that we were already connected to previously.
+	// Defaults to 2s.
 	ReconnectWait time.Duration
 
 	// CustomReconnectDelayCB is invoked after the library tried every
@@ -347,16 +349,20 @@ type Options struct {
 
 	// ReconnectJitter sets the upper bound for a random delay added to
 	// ReconnectWait during a reconnect when no TLS is used.
+	// Defaults to 100ms.
 	ReconnectJitter time.Duration
 
 	// ReconnectJitterTLS sets the upper bound for a random delay added to
 	// ReconnectWait during a reconnect when TLS is used.
+	// Defaults to 1s.
 	ReconnectJitterTLS time.Duration
 
 	// Timeout sets the timeout for a Dial operation on a connection.
+	// Defaults to 2s.
 	Timeout time.Duration
 
 	// DrainTimeout sets the timeout for a Drain Operation to complete.
+	// Defaults to 30s.
 	DrainTimeout time.Duration
 
 	// FlusherTimeout is the maximum time to wait for write operations
@@ -365,10 +371,12 @@ type Options struct {
 
 	// PingInterval is the period at which the client will be sending ping
 	// commands to the server, disabled if 0 or negative.
+	// Defaults to 2m.
 	PingInterval time.Duration
 
 	// MaxPingsOut is the maximum number of pending ping commands that can
 	// be awaiting a response before raising an ErrStaleConnection error.
+	// Defaults to 2.
 	MaxPingsOut int
 
 	// ClosedCB sets the closed handler that is called when a client will
@@ -401,12 +409,14 @@ type Options struct {
 
 	// ReconnectBufSize is the size of the backing bufio during reconnect.
 	// Once this has been exhausted publish operations will return an error.
+	// Defaults to 8388608 bytes (8MB).
 	ReconnectBufSize int
 
 	// SubChanLen is the size of the buffered channel used between the socket
 	// Go routine and the message delivery for SyncSubscriptions.
 	// NOTE: This does not affect AsyncSubscriptions which are
 	// dictated by PendingLimits()
+	// Defaults to 65536.
 	SubChanLen int
 
 	// UserJWT sets the callback handler that will fetch a user's JWT.
@@ -861,6 +871,7 @@ func NoEcho() Option {
 }
 
 // ReconnectWait is an Option to set the wait time between reconnect attempts.
+// Defaults to 2s.
 func ReconnectWait(t time.Duration) Option {
 	return func(o *Options) error {
 		o.ReconnectWait = t
@@ -869,6 +880,7 @@ func ReconnectWait(t time.Duration) Option {
 }
 
 // MaxReconnects is an Option to set the maximum number of reconnect attempts.
+// Defaults to 60.
 func MaxReconnects(max int) Option {
 	return func(o *Options) error {
 		o.MaxReconnect = max
@@ -877,6 +889,7 @@ func MaxReconnects(max int) Option {
 }
 
 // ReconnectJitter is an Option to set the upper bound of a random delay added ReconnectWait.
+// Defaults to 100ms and 1s, respectively.
 func ReconnectJitter(jitter, jitterForTLS time.Duration) Option {
 	return func(o *Options) error {
 		o.ReconnectJitter = jitter
@@ -895,6 +908,7 @@ func CustomReconnectDelay(cb ReconnectDelayHandler) Option {
 }
 
 // PingInterval is an Option to set the period for client ping commands.
+// Defaults to 2m.
 func PingInterval(t time.Duration) Option {
 	return func(o *Options) error {
 		o.PingInterval = t
@@ -904,6 +918,7 @@ func PingInterval(t time.Duration) Option {
 
 // MaxPingsOutstanding is an Option to set the maximum number of ping requests
 // that can go unanswered by the server before closing the connection.
+// Defaults to 2.
 func MaxPingsOutstanding(max int) Option {
 	return func(o *Options) error {
 		o.MaxPingsOut = max
@@ -912,6 +927,7 @@ func MaxPingsOutstanding(max int) Option {
 }
 
 // ReconnectBufSize sets the buffer size of messages kept while busy reconnecting.
+// Defaults to 8388608 bytes (8MB).
 func ReconnectBufSize(size int) Option {
 	return func(o *Options) error {
 		o.ReconnectBufSize = size
@@ -920,6 +936,7 @@ func ReconnectBufSize(size int) Option {
 }
 
 // Timeout is an Option to set the timeout for Dial on a connection.
+// Defaults to 2s.
 func Timeout(t time.Duration) Option {
 	return func(o *Options) error {
 		o.Timeout = t
@@ -936,6 +953,7 @@ func FlusherTimeout(t time.Duration) Option {
 }
 
 // DrainTimeout is an Option to set the timeout for draining a connection.
+// Defaults to 30s.
 func DrainTimeout(t time.Duration) Option {
 	return func(o *Options) error {
 		o.DrainTimeout = t
@@ -1078,6 +1096,7 @@ func Nkey(pubKey string, sigCB SignatureHandler) Option {
 
 // SyncQueueLen will set the maximum queue len for the internal
 // channel used for SubscribeSync().
+// Defaults to 65536.
 func SyncQueueLen(max int) Option {
 	return func(o *Options) error {
 		o.SubChanLen = max