When you have a large range of cells to copy in Excel, there are a few different ways that you can do it. Here are some tips:
One way to copy a large range of cells is to use the fill handle. To do this, select the cell or range of cells that you want to copy. Then, click and hold down the left mouse button on the fill handle (the small square in the bottom-right corner of the selected cell). While holding down the mouse button, drag the fill handle over the range of cells that you want to fill. When you release the mouse button, the selected cells will be copied.
Another way to copy a large range of cells is to use the AutoFill feature. To do this, select the cell or range of cells that you want to copy. Then, click on the Fill button on the Home tab of the ribbon (in the Editing group). From there, you can choose how you want to fill the selected cells, such as by copying them down or across.
If you need to copy a large range of cells frequently, you can create a macro to do it for you. This is a good option if you're comfortable working with macros. To learn more about creating macros in Excel, see Create or delete a macro in Excel. Once you've created your macro, you can run it by clicking on its name in the Macro dialog box (click Macros on the View tab to open this dialog box).