Dragging Down Formulas with Constant Cells

Is there any way to use the cross in the bottom right corner of each cell to drag a formula with some cells that vary, but others that remain constant?

For example:
If I want the formula to be:
B2+C2
B3+C2
B4+C2
B5+C2, etc.

Is there a way to drag "B2+C2" down to make it look like the list above, rather than dragging it down to see:
B2+C2
B3+C3
B4+C4
B5+C5, etc.

Thank you!

That's exactly what I was looking for!

Thank you!