In Excel, to open the dialog box for editing in-built functions (i.e.,Function Arguments) when you’re staying in a cell, follow the below steps.
Type part of the name of the function inside the cell, you will receive suggestion to select the functions. Move to the required function using arrow keys or mouse and press Tab to select the function in the cell.
To open the dialog box to enter the arguments of the function, press CTRL + a. Enter the desired values in the appeared dialog box.