diff --git a/bar.go b/bar.go
index ef43717..665d03d 100644
--- a/bar.go
+++ b/bar.go
@@ -150,8 +150,9 @@
 	}
 }
 
-// SetRefill sets refill, if supported by underlying Filler.
-// Useful for resume-able tasks.
+// SetRefill fills bar with refill rune up to amount argument.
+// Given default bar style is "[=>-]<+", refill rune is '+'.
+// To set bar style use mpb.BarStyle(string) BarOption.
 func (b *Bar) SetRefill(amount int64) {
 	type refiller interface {
 		SetRefill(int64)
diff --git a/bar_option.go b/bar_option.go
index 1e446dc..aa90f99 100644
--- a/bar_option.go
+++ b/bar_option.go
@@ -130,7 +130,7 @@
 
 // BarStyle overrides mpb.DefaultBarStyle, for example BarStyle("╢▌▌░╟").
 // If you need to override `reverse tip` and `refill rune` set 6th and
-// 7th rune respectively, for example BarStyle("[=>-]<+").
+// 7th rune respectively, for example mpb.BarStyle("[=>-]<+").
 func BarStyle(style string) BarOption {
 	if style == "" {
 		return nil
diff --git a/progress.go b/progress.go
index 2ddda91..a366b92 100644
--- a/progress.go
+++ b/progress.go
@@ -166,7 +166,7 @@
 	}
 }
 
-// UpdateBarPriority same as *Bar.SetPriority.
+// UpdateBarPriority same as *Bar.SetPriority(int).
 func (p *Progress) UpdateBarPriority(b *Bar, priority int) {
 	p.setBarPriority(b, priority)
 }