APEX SDK

We want to have configured branding for two accounts so thinking to have separate accounts. 

Question is :

1. Can we configure two account API Keys in salesforce,
2. If yes, how can we do that? 
3. How do we specify which one to use and when?

I am trying to use ceremony settings in salesforce to customize various options, but they do not seem to render.

Please help me understand what i am missing. I could not find appropriate documentation for each node.

You will see event if i am setting session bar as true, it still does not show up
Also, setting up background color and color has no effect.

Logo is too big.

Here below is settings I am using:

OneSpanAPIObjects.Settings settings= new OneSpanAPIObjects.Settings();

https://community.onespan.com/documentation/onespan-sign/codeshare/designer-view-apex-sdk

I believe we are using nCino's managed package built on Apex SDK for OneSpan RESTful API interface.  I believe this SDK is available from GitHub showing about 25 Apex API's but I don't see "Designer View" as part of GitHub Apex SDK's. There does seem to be a "Designer View" available as shared "Apex code", is this correct?

We have encountered two issues

We are trying to implement one use case using APEXSDK per below provided URL.

https://community.onespan.com/documentation/guides/developer/creating-and-sending-transaction

I am attmepting to use a VisualForce page that was created as the template for the signing document. I added the text tags: {{esl:SellerSign1:Signature1,size(80,20)}}
{{esl:SellerSign1:Autofield1:SigningDate1,size(80,20)}}

{{esl:SellerSign1:InputField2:TextField2,size(80,20)}}

{{esl:BuyerSign1:Signature2,size(80,20)}}

{{esl:BuyerSign1:Autofield2:SigningDate2,size(80,20)}}

{{esl:BuyerSign1:InputField3:TextField3,size(80,20)}}

Those are inside of the visualforce component.