diff --git a/bar.go b/bar.go
index 3ff91c0..ce7d11e 100644
--- a/bar.go
+++ b/bar.go
@@ -178,7 +178,9 @@
 }
 
 // SetTotal sets total to an arbitrary value. Setting it to negative
-// value is equivalent to (*Bar).SetTotal((*Bar).Current(), bool).
+// value is equivalent to (*Bar).SetTotal((*Bar).Current(), bool). If
+// triggerCompleteNow is true, current value is set to total and
+// complete event is triggered right away.
 func (b *Bar) SetTotal(total int64, triggerCompleteNow bool) {
 	select {
 	case b.operateState <- func(s *bState) {
diff --git a/progress.go b/progress.go
index c0210ef..b32d998 100644
--- a/progress.go
+++ b/progress.go
@@ -106,8 +106,8 @@
 }
 
 // Add creates a bar which renders itself by provided filler.
-// If `total <= 0` trigger complete event is disabled until reset with (*bar).SetTotal(int64, bool).
-// Panics if *Progress instance is done, i.e. called after (*Progress).Wait.
+// If `total <= 0` triggering complete event by increment methods is disabled.
+// Panics if (*Progress) instance is done, i.e. called after (*Progress).Wait().
 func (p *Progress) Add(total int64, filler BarFiller, options ...BarOption) *Bar {
 	if filler == nil {
 		filler = NopStyle().Build()