Hi Stephen,
Thanks for using Essential tools.
You can set the
LayoutMode property of card layout to
Fill, this property will fill the control inside the entire container.
Here is the code snippet:
this.cardLayout1.LayoutMode = Syncfusion.Windows.Forms.Tools.CardLayoutMode.Fill;
I have attached a sample. Please take a look and let me know if you have any questions.
cardlayout.zip
Best Regards,
Seetha