review comments from DaveS

Author: JamesH65

documentation/asciidoc/computers/compute-module/cmio-display.adoc

@@ -26,13 +26,15 @@ dtoverlay=vc4-kms-dsi-7inch
 
 === Connect a display to DISP0/DSI0
 
-To connect a display to DISP0/DSI0:
+To connect a display to DISP0/DSI0 on CM1, CM3 and CM4 IO boards:
 
 . Connect the display to the DISP0/DSI0 port on the Compute Module IO board through the 22W to 15W display adapter.
 . _(CM1, CM3, CM3+, and CM4S only)_: Connect the following GPIO pins with jumper cables:
   * `28` to `CD0_SDA`
   * `29` to `CD0_SCL`
 
+ . _(CM4 only)_ On the Compute Module 4 IO board, add the appropriate jumpers to J6, as indicated on the silkscreen.
+
 . Reconnect the Compute Module to power.
 . Add the following line to `/boot/firmware/config.txt`:
 +
@@ -64,16 +66,16 @@ ignore_lcd=1
 
 == Attaching the Touch Display 2 LCD panel
 
-Touch Display 2 is a 720x1280 7" LCD display designed specifically for Raspberry Pi devices (see https://www.raspberrypi.com/products/touch-display-2/). It connects in much the same way as the original touch display, but the software setup on Compute Modules is slightly different as it uses a different display driver. See xref:../accessories/touch-display-2.adoc[Touch Display 2] for connection details.
+Touch Display 2 is a 720x1280 7" LCD display designed specifically for Raspberry Pi devices (see https://www.raspberrypi.com/products/touch-display-2/). It connects in the same way as the original touch display, but the software setup on Compute Modules is slightly different as it uses a different display driver. See xref:../accessories/touch-display-2.adoc[Touch Display 2] for connection details.
 
-Edit the /boot/firmware/config.txt file and add the following to enable Touch Display 2 on DISP1/DSI1.
+Edit the /boot/firmware/config.txt file and add the following to enable Touch Display 2 on DISP1/DSI1. You will also need to add jumpers to J6 as indicated on the silkscreen.
 
 [source,ini]
 ----
 dtoverlay=vc4-kms-dsi-ili9881-7inch
 ----
 
-To use DISP0/DSI0 use the following:
+To use DISP0/DSI0, use the following:
 
 [source,ini]
 ----