Calculate While Typing

You can see the result as you type.
Very useful when you want to check your work.

Menu:  Calculation ▸ Calculate While Typing
Shortcut:  ⌘ =

Transformations

Overview

You can transform result:

You can transform number:

You can do more with Switch Sign and Inverse.
Let’s explore.

Switch Sign
Transformation

Besides switching the sign of a number, you can also switch between plus (+) and minus (–) sign.

Example

Let’s use it for ‘Forecast ± Error %’.

270 ± 7%

Let’s enable Calculate While Typing (⌘=) to see the result.

Inverse
Transformation

Inverse transforms the subject to its reciprocal, i.e.
something → ¹/_something

You can a invert number:

Invert a trigonometric function:

Likewise, hyperbolic function:

Invert division:

Inverse
Operator

Shortcut:   '

Easy way to remember the shortcut:

(The inverse transformation shortcut is also based on this.)

Here are 2 uses:

Reciprocal

Enter:   7'

Inverse trigonometric functions

Enter:   S'

(S = shortcut for sin)

Window Title

You can customize the window title via Preferences > General.

Quick Change

You can change to a different title by right-clicking
or control-clicking the window title.

Toggle Formats

Let’s look at the format commands under View > Format.

They actually toggle the format:

Default◀⌘ K▶Decimal Places

Default◀⌘ L▶Scientific Notation

Default◀⌘ /▶Fraction

This means you can press ⌘/ for fraction,
and press ⌘/ again to go back.

Also:

Radians◀⌥⌘ R▶Degrees

Polar◀⌥⌘ P▶Rectangular

Copy as PDF

You can do it via  Edit > Copy Expression (⇧⌘C).
The PDF of the expression is automatically copied.

PDF Scale

You may notice Export as PDF lets you to set a scale for PDF.

This scale also applies to the PDF you are copying.

More Double Keys

P   →   π

PP   →   %

I   →   Imaginary unit

II   →   Inclusive of %

H   →   Hypotenuse

HH   →   Adjacent

See Longer Expressions

Here we have an expression too long to fit.

To see more, we have to scroll or resize the window.
There is another way.

Click and hold the eye button to reveal a secret option:

Now you see more.

Finding More Gems

Many buttons have contextual menus; this is where you access many ‘hidden’ features.

1.  Press ctrl to reveal these buttons:

2.  Click and hold the button until its menu appears.

3.  Enjoy your new discovery!