diff --git a/README.md b/README.md
index 5812350..6bfa113 100644
--- a/README.md
+++ b/README.md
@@ -205,5 +205,8 @@ Brightness, zoom, focus, etc, can be adjusted
 Then adjust the value
 > `v4l2-ctl -c <option>=<value>`
 
+Ingrease GPU memory. Select "7 Advanced Options", then "A3 Memory Split", select "256" and press Return key, go to finish, and select to reboot.
+> `sudo raspi-config`
+
 See used GPU memory
 > `sudo vcdbg reloc`
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