Hello,
Please take an inspiration from the following thread:
How to check if CMSEditableRegion has contents or not?You can pre-fill the Editable region with text in the following way:
You would need to use following code in OnPreRender method of your aspx template:
protected override void OnPreRender(EventArgs e)
{
base.OnPreRender(e);
this.MainContentText.LoadContent("some text");
}
where MainContentText is ID of your editable region control.
Best Regards,
Martin Danko