> ## Documentation Index
> Fetch the complete documentation index at: https://docs.abbyy.com/llms.txt
> Use this file to discover all available pages before exploring further.

# GapMeasurementUnitEnum

> GapMeasurementUnitEnum in the ABBYY FineReader Engine API — Measurement units for the gap between blocks being sorted.

GapMeasurementUnitEnum enumeration constants define measurement units for the gap between blocks to be sorted.

```
typedef enum {
 GMU_Pixel,
 GMU_Twip,
 GMU_PercentOfMinimumFontSize
} GapMeasurementUnitEnum;
```

## Elements

| Name | Description |
| - | - |
| GMU\\\_Pixel | Pixels. |
| GMU\\\_Twip | Twips (1/20 of a typographical point). |
| GMU\\\_PercentOfMinimumFontSize | Percent of the minimum font size of the text in two adjacent blocks. |

## Used in

[SortingBlocksParams::GapMeasurementUnit](/fine-reader/engine/api-reference/parameter-objects/preprocessing-analysis-recognition-and-synthesis-parameters/sortingblocksparams#gapmeasurementunit)