Hi @hasanali1 ,
I see you have Dawn version 8.0, you can change the max-width of your logo by following the instructions below.
- From the Admin page, go to Online store > Theme > Click the three dots > Edit code
- Open the settings_schema.json file under the Config folder
- Change the “max” to 500. See image below. Make sure to SAVE
You should see the option to adjust your logo width to 400 in the theme editor.
- From the Admin page, go to Online store > Theme > Customize
- Change the “max” to 500. See image below. Make sure to SAVE

