Look into templates to solve this problem.
In the layout view select the instance you would like to create at runtime, after making all the changes you want, look in the Properties bar for the 'Template mode' property and set it to 'Template', then set the 'Template name' property to some value of your choice.
At runtime when you use the Create Object action, you can fill in the 'template' parameter with the value you used for 'Template name'. The new instance will take all the properties that were set in the editor.