How to custom page margin in google docs api?

Unfortunately, in the current stage, it seems that documentStyle and content cannot be set with the method of documents.create. Ref I confirmed that this has still not been modified. So as the current workaround, how about the following flow?

Flow:

1. Create new Document using the method of documents.create. In this case, the title can be set.

2. Set updateDocumentStyle using the method of documents.batchUpdate.

   • From your question, the request body for documents.batchUpdate is as follows.

     {
       "requests": [
         {
           "updateDocumentStyle": {
             "documentStyle": {
               "marginTop": {
                 "magnitude": 100,
                 "unit": "PT"
               },
               "marginLeft": {
                 "magnitude": 500,
                 "unit": "PT"
               }
             },
             "fields": "marginTop,marginLeft"
           }
         }
       ]
     }
     

References:

• Method: documents.create
• Method: documents.batchUpdate

If this was not the direction you want, I apologize.