Currently, I’m using developer edition. Can i hide the toolbar in the red area by using DocsApi.
Hey @carl1 
If I understand correctly, this is what you are looking for:
You can also try applying these parameters directly on this page: Customization Settings.
Please review, and let me know if this meets your needs or if you have any further questions 
Thanks for providing that option. What about the status bar and 2 left and right panels, i wanna hide it by using settings
Hi @carl1
I apologize for the delay in responding. Since you hold a license, you’re welcome to reach out directly to our support team at support for a quicker response to your inquiries.
Regarding hiding the toolbar, could you please clarify specifically what you would like to achieve? Any additional details will help us understand your needs more accurately.
You can also explore all available configuration options here: ONLYOFFICE API Customization Settings.
Thank you 