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Under Options (top left corner) you can find "Settings":- Themes - define your own theme or select one of the presets
- Top Colors - define your own colors for the top of the main screen (input and answer areas)
- Sound - controls button tap sounds (iOS default, Alternative, OFF or CALC original)
- Reset Custom Units - will erase all units setup by a user for the Converter under the Custom category
- Max Decimals - defines the maximum number of decimals before rounding/scientific notation takes place
- Language - allows users to override CALC language settings
- Timer - hides the Timer in the top left corner of the main screen (T>)
- Buttons Highlight - specifies the style of button push events (Highlight, Flip or OFF)
- Buttons Shape - defines the button shape as Round corners, Squares or Flat (OFF)
- Converter Icons - specifies the style of convertor category icons (ON/OFF or Theme colored)
- Force Decimal Dot - forces the use of decimal dot regardless of localization settings
- Custom Parallax - if custom theme with background image is used, specifies the depth of the parallax effect
- Font - provides several options for alternative Fonts and their relative size in respect to the original
- Input Format - turns the number formatting ON/OFF when typing expressions
- Use sqrt(a;b) - toggles between square root button to act as a function: sqrt(x;2) or exp.: x^(-2)
- Swap Zero / Decimal - swaps the zero and decimal buttons on the calculator main screen
- Numpad: 123 vs. 789 - reverses the order of numbers on the calculator main screen
- Convertor - Options - allows specifying the JetFuel density conversion rates for the Converter
- Clear Expression - defines timeframe for expression to remain current after CALC becomes inactive - i.e. if you reopen CALC and start typing a new expression, the old one will auto-clear if specified time has passed or not at all if turned OFF
- Use Answer - enables/disables the quick last answer button under the answer area of the main screen
- Spotlight Search - Siri/Spotlight iOS searching of history - up to last 10 or 50 entries or OFF
- Scientific functions - Portrait mode only - enables the single screen scientific functions view (i.e. no need to slide left)
- Custom % - allows for a single custom percentage for the Tip calculator (on Swipe down or Tap&Hold the % button)
- Division Symbol / - toggles the division button between "/" and "÷"