<p>I am very new to 3D printing and I am trying to adjust my firmware. I use the Arduino IDE 1.8.12.</p>

<p>I downloaded the firmware from GitHub that suits my printer, but every time that I try to open the <code>marlin.ino</code> file within, it opens in the Arduino with only the blue "marlin" tab. It doesn't load the other tabs such as <code>Configuration.h</code> and <code>Configuration_adv.h</code>.</p>

<p>I have watched a few YouTube videos, and in all of them, these tabs seem to open automatically.</p>

<p>Thank you very much for any help, I've been struggling to figure this out.</p>

CC BY-SA 4.0
2020-03-23T23:10:04.230Z
Did you download Marlin 2.0.x and opened it an older Arduino IDE? Older versions of Arduino IDE do not work with directory structure layout of Marlin 2.0.x.
0scar
CC BY-SA 4.0
2020-03-23T23:13:43.433Z
Thanks for the reply, I have arduino 1.8.12 and Im trying to open Marlin 2.0.x
mcdon482
CC BY-SA 4.0
2020-03-23T23:21:07.847Z
You can also use VSCode and PlatformIO plug-in
0scar
CC BY-SA 4.0
2020-03-24T15:41:44.747Z
Does this help to answer your question? [Updating Marlin Firmware - Step by Step Guide](https://3dprinting.stackexchange.com/questions/12153/updating-marlin-firmware-step-by-step-guide)
Trish
CC BY-SA 4.0
2020-03-24T17:04:56.143Z
Can you copy the files to a "real" PC and open the  .h files in a text editor?
Carl Witthoft
<marlin><arduino-mega-2650><tevo-tarantula>
How do I access Configuration.h?
mcdon482
# How do I access Configuration.h?

(Asked by: username_0 on 2020-03-23)

I am very new to 3D printing and I am trying to adjust my firmware. I use the Arduino IDE 1.8.12.

I downloaded the firmware from GitHub that suits my printer, but every time that I try to open the `marlin.ino` file within, it opens in the Arduino with only the blue "marlin" tab. It doesn't load the other tabs such as `Configuration.h` and `Configuration_adv.h`.

I have watched a few YouTube videos, and in all of them, these tabs seem to open automatically.

Thank you very much for any help, I've been struggling to figure this out.

**Tags:** marlin, arduino-mega-2650, tevo-tarantula

> **Comments:**
> **username_1**: Did you download Marlin 2.0.x and opened it an older Arduino IDE? Older versions of Arduino IDE do not work with directory structure layout of Marlin 2.0.x.  
> **username_0**: Thanks for the reply, I have arduino 1.8.12 and Im trying to open Marlin 2.0.x  
> **username_1**: You can also use VSCode and PlatformIO plug-in  
> **username_2**: Does this help to answer your question? [Updating Marlin Firmware - Step by Step Guide](https://3dprinting.stackexchange.com/questions/12153/updating-marlin-firmware-step-by-step-guide)  
> **username_3**: Can you copy the files to a "real" PC and open the  .h files in a text editor?  

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## 0 answers

