ZoomCharts Documentation

This new label type requires the Reference Value field to be populated.

Enable the "Change Value Label" toggle to display, for each category, a dedicated label showing the numerical difference between the actual value and the required Reference Value.

If the Reference Value field is empty, the change toggle is unavailable.

Change / Difference Value Mode

Defines how the change difference is calculated and displayed.

1. Absolute Change: Displays the numeric difference.
   • Formula: Actual− Reference = Absolute change
   • Example:
     60 → 80
     80 - 60 = 2
2. Relative Change: Displays relative difference. How big the change is relative to the previous value %.
   • Formula: (Actual − Reference) / Reference
   • Example:
     100 → 120
     (120 − 100) / 100 = 0.20 = 20%
   • This answers: “By what percent did it grow compared to what it was before?”
3. Percentage Absolute Change: Displays absolute percentage difference. The difference in percentage points.
   • Formula: Actual%− Reference% = Percentage Absolute Change
   • Example:
     20% → 25%
     25% − 20% = 5 percentage points
   • This is not a relative percentage — it’s a direct subtraction of percentages. People often say “5%”, but the precise term is 5 percentage points.
4. Percentage Relative Change: Displays relative percentage difference. How much the percentage itself changed relative to its old value.
   • Formula: (Actual% − Reference%) / Reference%
   • Example:
     20% → 25%
     (25% − 20%) / 20% = 5% / 20% = 0.25 = 25%

Common outside label settings

Prefix - Defines custom text or symbol shown before the value.

Suffix - Defines custom text or symbol shown after the value.

Value Decimals - Controls how many digits are shown after the decimal point for value labels. This setting is available is Change / Difference Value Mode is set to Absolute Change.

• Auto: inherits decimal places from the data column
• Range: 0–9

Percentage Decimals - Controls how many digits are shown after the decimal point for percentage labels. This setting is available is Change / Difference Value Mode is set to Relative change, Percentage Absolute Change or Percentage Relative Change

• Auto: inherits decimal places from the data column
• Range: 0–9

Display Units- Controls how numeric values are scaled or shortened. This setting is available is Change / Difference Value Mode is set to Absolute Change.

• Auto – automatically selects an appropriate unit (thousands, millions, etc.)
• None – shows full number without shortening
• Thousands
• Millions
• Billions
• Trillions