# Discourse Help section **URL:** \ **Category:** Site Feedback\ **Created:** [January 11, 2021, 6:14pm UTC](https://rpi-rgb-led-matrix.discourse.group/t/discourse-help-section/77 "2021-01-11T18:14:08Z")\ **Posts on this page:** 8\ **Page:** 1
**Author:** ![jax2000](https://avatars.discourse-cdn.com/v4/letter/j/c6cbf5/32.png) [@jax2000](https://rpi-rgb-led-matrix.discourse.group/u/jax2000)\ **Post date:** [January 11, 2021, 6:14pm UTC](https://rpi-rgb-led-matrix.discourse.group/t/discourse-help-section/77/1 "2021-01-11T18:14:08Z")
I think there should be a Discourse Help section. For example, I would like to edit some previous code I uploaded,. but it is not letting me do so. What is the method? ---
**Author:** ![marcmerlin](https://yyz2.discourse-cdn.com/free1/user_avatar/rpi-rgb-led-matrix.discourse.group/marcmerlin/32/40_2.png) [@marcmerlin](https://rpi-rgb-led-matrix.discourse.group/u/marcmerlin)\ **Post date:** [January 12, 2021, 3:57pm UTC](https://rpi-rgb-led-matrix.discourse.group/t/discourse-help-section/77/2 "2021-01-12T15:57:01Z")
Doesn’t discourse have built in help? (didn’t look in details though). Are you trying to edit a previous post you made that has code inside? There is a pencil / edit button next to each post test ---
**Author:** ![jax2000](https://avatars.discourse-cdn.com/v4/letter/j/c6cbf5/32.png) [@jax2000](https://rpi-rgb-led-matrix.discourse.group/u/jax2000)\ **Post date:** [January 12, 2021, 4:52pm UTC](https://rpi-rgb-led-matrix.discourse.group/t/discourse-help-section/77/3 "2021-01-12T16:52:08Z")
Yes, I tried the pencil /edit but it is not allowing me to make the change. test ---
**Author:** ![marcmerlin](https://yyz2.discourse-cdn.com/free1/user_avatar/rpi-rgb-led-matrix.discourse.group/marcmerlin/32/40_2.png) [@marcmerlin](https://rpi-rgb-led-matrix.discourse.group/u/marcmerlin)\ **Post date:** [January 12, 2021, 8:50pm UTC](https://rpi-rgb-led-matrix.discourse.group/t/discourse-help-section/77/4 "2021-01-12T20:50:00Z")
@jax200 Ok, it worked for me and not for you, but I have admin access so I can even edit your post if need be. I just raised your trust level to 2, does that allow you to edit your message now? Also, some boards (not sure about this one), do not allow you to edit a post after x number of hours or days, not sure about this one. ---
**Author:** ![jax2000](https://avatars.discourse-cdn.com/v4/letter/j/c6cbf5/32.png) [@jax2000](https://rpi-rgb-led-matrix.discourse.group/u/jax2000)\ **Post date:** [January 14, 2021, 2:21pm UTC](https://rpi-rgb-led-matrix.discourse.group/t/discourse-help-section/77/5 "2021-01-14T14:21:15Z")
@marcmerlin Thanks for you help. I am able to edit now. ---
**Author:** ![Stargazer2022](https://avatars.discourse-cdn.com/v4/letter/s/9de053/32.png) [@Stargazer2022](https://rpi-rgb-led-matrix.discourse.group/u/Stargazer2022)\ **Post date:** [December 14, 2021, 7:08pm UTC](https://rpi-rgb-led-matrix.discourse.group/t/discourse-help-section/77/6 "2021-12-14T19:08:09Z")
Trying to run my rpi-rgb-led-matrix ppm at boot up but things like autostart, crontab , bash script, rc.local Are not doing it. I’m running raspian desktop on a pi 3b. I’ve successfully created a desktop shortcut that runs the led matrix but can’t get it to auto run at boot up. The path is: /home/pi/rpi-rgb-led-matrix/led-matrix -r 32 -c 4 -D 1 test.ppm. Can anyone help with this problem. ---
**Author:** ![Stargazer2022](https://avatars.discourse-cdn.com/v4/letter/s/9de053/32.png) [@Stargazer2022](https://rpi-rgb-led-matrix.discourse.group/u/Stargazer2022)\ **Post date:** [December 24, 2021, 1:43am UTC](https://rpi-rgb-led-matrix.discourse.group/t/discourse-help-section/77/7 "2021-12-24T01:43:49Z")
Has anyone had any success getting the Led Matrix display to actually start up on boot? I’ve tried just about every method but the Pi hat fails to load. It does work from a desktop shortcut after boot up. I’m now thinking it can’t be done. I’m seeing “failed to load hat overlay” "dterror: not a valid DFT - err-9 If you have succeeded , please tell us how you did it. ---
**Author:** ![marcmerlin](https://yyz2.discourse-cdn.com/free1/user_avatar/rpi-rgb-led-matrix.discourse.group/marcmerlin/32/40_2.png) [@marcmerlin](https://rpi-rgb-led-matrix.discourse.group/u/marcmerlin)\ **Post date:** [January 14, 2022, 5:36pm UTC](https://rpi-rgb-led-matrix.discourse.group/t/discourse-help-section/77/8 "2022-01-14T17:36:35Z")
I use /etc/rc.local and added ```auto screen -d -m -S screen ~/ArduinoOnPc-FastLED-GFX-LEDMatrix/examples/TME/Table_Mark_Estes[0-9][0-9] ``` This is to run in the background without hanging the boot.