diff --git a/src/usage.txt b/src/usage.txt
index 94cf3cf..b23e1ad 100644
--- a/src/usage.txt
+++ b/src/usage.txt
@@ -1,5 +1,7 @@
 "o" to open a new image
 "r" to rotate
 "i" to invert colors
+"f" to switch filter
+"b" to toggle the bar
 "s" to save the image
 "q" to quit