diff --git a/src/btop_menu.cpp b/src/btop_menu.cpp
index bf57e8c..be5f8c1 100644
--- a/src/btop_menu.cpp
+++ b/src/btop_menu.cpp
@@ -191,7 +191,7 @@ namespace Menu {
 		{"z", "Toggle totals reset for current network device"},
 		{"a", "Toggle auto scaling for the network graphs."},
 		{"y", "Toggle synced scaling mode for network graphs."},
-		{"f, /", "To enter a process filter."},
+		{"f, /", "To enter a process filter. Start with ! for regex."},
 		{"delete", "Clear any entered filter."},
 		{"c", "Toggle per-core cpu usage of processes."},
 		{"r", "Reverse sorting order in processes box."},