Can you create a button to open Snap Core First in Grid 3?

Yes, you can do this with the computer control option in Grid 3.

1. Launch both Snap Core First and Grid 3 on your computer or device.
2. In Grid 3, select the menu (top left corner).
3. Select Edit Grid.
4. Select the empty cell you want to open Snap with.
5. Select Create Cell.
6. Choose Computer Control.
7. Choose Next.
8. Choose Start Program.
9. Choose Next.
10. Choose Snap Core First.
11. Select Ok.
12. Select Finish Editing.
13. Select Yes to save your changes.