Control buttons appear at the top of the AddUp 2 window. Three buttons to the left provide menu access. The leftmost button opens the main menu which contains all options; pressing the Alt key does the same thing. The second button marked with a B is a clickable shortcut to the Buttons submenu. The third button marked with a ? is a similar shortcut to the Help sub-menu. Three buttons to the right perform the usual Windows minimize, restore/maximize and close operations.
The Buttons submenu controls various panels shown along the left side of the window. Each panel contains a set of related calculator buttons. Specific panels are selected by navigating the menu and checking or unchecking them. All panels are either hidden or shown by checking or unchecking the Hide Buttons menu option.
Open the Buttons menu, navigate to the Functions submenu, on to the General Mathematics submenu and its Exponentials submenu, then click on Show the "Exponentials" button panel. A panel containing exponent, power, logarithm and other related buttons will be shown on the left side of the window. Now double-click the Buttons control button to see how to quickly show or hide all calculator buttons.
Place the caret on an empty line in the work area. Click the exp button of the Exponential functions panel. The function is entered at the current caret position in the work area and the caret moves inside the parentheses.
You can now enter a value for this function, say 1, and press Enter.
exp(1) = 2.71828
This is the simplest mode of operation: the function name is inserted, then you provide the argument value. Now use the arrow keys or the mouse to return to the expression and highlight argument 1 like this:
exp(1) = 2.71828
With this selection in place, click the ln button of the same panel to observe another mode of operation: the highlighted text (whatever is selected) becomes the argument value of the new function which gets inserted. Press Enter to see the result.
exp( ln(1) ) = 1
The exponent of the natural logarithm of 1 is indeed 1.
A third mode of operation selects an entire expression as function argument. Place the caret anywhere on the line that contains the expression you want to use. Hold down the Ctrl key as you click the fact button:
fact(exp( ln(1) ))
The entire current expression is used as argument for the factorial function. Press Enter to see that the factorial of 1 is also 1.