By default, the minimum width for a 4D Calc area in 4D v6 and higher is now 250 pixels wide by 75 pixels high. If your 4D Calc area is smaller than this, it will display as a button. When the user clicks this button, a full-screen 4D Calc external window opens up.

If you would prefer to display a smaller 4D Calc area directly on your form, you can use the fifth and sixth parameters of the SP OPTIONS command to change the minimum width and height for which the 4D Calc area will not display as a button.