# Tips & tricks

## Good points to remember (Cheat Sheet)

Input:
• Capital letters matter: X is not the same as x.
• Space can be a multiplication sign: ax in y = ax + b is interpreted as a new, previously undefined variable. Instead, use y = a x + b or y = a*x + b.
• Use up and down arrows in the input bar to scroll through previous commands.
• Pressing Enter will move the text cursor to the input bar.
• F3 will copy a selected object's definition to the input bar for easy redefinitions.
• The input help is found under the little triangle  to the right of the input bar.
Sliders:
• Use Arrow keys to control sliders, numbers and points.
• Set the increment in the Properties dialogue, on the Slider tab.
• Use Shift-Arrow for fine-tuning with 1/10 of the increment.
• Use Ctrl-Arrow for larger jumps with 10x the increment.
• Use Alt-Arrow for really large jumps with 100x the increment.
Points, lists, and commands:
• Points are written within parentheses: (3,5), (4.7,3.52), (a,f(a))…
• x(A) and y(A) returns the x- and y-coordinates for point A.
• Lists are written within curly braces: data = {A,B,C,D,E}.
• Commands have square brackets and capitals: Intersect[f,g] but ordinary parentheses are also allowed: Intersect(f,g).
Alt key:
• Alt-a gives , Alt-b gives , etc. Alt-o gives the degree sign 360°.
• Alt-i gives you the imaginary unit i, Alt-p gives , and Alt-e gives e = 2,718…
• Alt-2, Alt-3… give you whole number powers. Use ^2.5 for other powers.
• Indexes are typed with an underscore: S_1 = .
• Special characters are found under the alpha sign  to the right in the input bar
Graphics window:
• The axes have names: xAxis and yAxis.
• x(P) and y(P) gives you the coordinates of the point P.
• Ctrl-Drag the axes to zoom and Drag the background to pan.
• Escape de-selects any selected objects and activates the selection tool (the arrow).
Objects:
• Rename objects immediately after creation by just starting to type the name.
• Double-click objects to redefine them
• Drag from the Algebra window to the Graphics window to create a text label.
• Hide or show objects by clicking the visibility button  in the Algebra window.
Miscellaneous:
• Ctrl-F will erase tracks from tracing objects.
• F9 will recalculate random numbers
• Ctrl-Shift-S opens the spreadsheet. Ctrl-Shift-2 opens Graphics Window 2.
• View > Keyboard to get a virtual keyboard on-screen.
Make use of the user manuals, guides, and forums online. Links are in the Help-menu.