> ## 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. # CheckmarkGroup Object (ICheckmarkGroup Interface) This object represents a group of checkmark blocks ([CheckmarkBlock](/fine-reader/engine/api-reference/layout-related-objects/checkmarkblock) objects). The ICheckmarkGroup interface is derived from the [IBlock](/fine-reader/engine/api-reference/layout-related-objects/block) interface and inherits all its properties. Besides the standard collection functionality the CheckmarkGroup object allows you to set the maximum and minimum number of selected checkmarks in the group. * The indexing of ABBYY FineReader Engine collections starts with 0. * The foreach statement in C# (for each in Visual Basic .NET) can be used to manipulate the collection. ## Properties | Name | Type | Description | | --------------------------------------------------------------------------------------------------------------------- | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------- | | Count | [int](/fine-reader/engine/guided-tour/advanced-techniques/programming-aspects/working-with-properties), read-only | Stores the number of elements in the group. | | [Element](/fine-reader/engine/visual-components-reference/supplementary-objects/spellwordcollection/element-property) | [CheckmarkBlock](/fine-reader/engine/api-reference/layout-related-objects/checkmarkblock), [read-only](/fine-reader/engine/guided-tour/advanced-techniques/programming-aspects/working-with-properties#readonly_properties) | Provides access to a single element of the group. | | MaximumCheckedInGroup | [int](/fine-reader/engine/guided-tour/advanced-techniques/programming-aspects/working-with-properties) | Specifies the maximum number of selected checkmark blocks in the group. The default value is -1, which means that all checkmark blocks in the group can be selected. | | MinimumCheckedInGroup | [int](/fine-reader/engine/guided-tour/advanced-techniques/programming-aspects/working-with-properties) | Specifies the minimum number of selected checkmark blocks in the group. The default value is 0. | ## Methods | Name | Description | | ----------------------------------------------------------------------------------------------------------------------- | ---------------------------------------------------------------------------------- | | [AddNew](/fine-reader/engine/api-reference/layout-related-objects/checkmarkgroup/addnew-method) | Creates a checkmark block and inserts it into the specified position in the group. | | [DeleteAll](/fine-reader/engine/visual-components-reference/supplementary-objects/spellwordcollection/deleteall-method) | Removes all the elements from the group. | | [DeleteAt](/fine-reader/engine/visual-components-reference/supplementary-objects/spellwordcollection/deleteat-method) | Removes an element from the group. | | [Item](/fine-reader/engine/visual-components-reference/supplementary-objects/spellwordcollection/item-method) | Provides access to a single element of the group of checkmark blocks. | ## Related objects CheckmarkGroup[](/fine-reader/engine/visual-components-reference/supplementary-objects/spellwordcollection/element-property)[](/fine-reader/engine/api-reference/supplementary-objects-and-methods/region)[](/fine-reader/engine/visual-components-reference/supplementary-objects/spellwordcollection/element-property)[](/fine-reader/engine/api-reference/layout-related-objects/layout#blocks)[](/fine-reader/engine/api-reference/supplementary-objects-and-methods/region)[](/fine-reader/engine/api-reference/layout-related-objects/checkmarkblock)[](/fine-reader/engine/api-reference/layout-related-objects/block)[](/fine-reader/engine/api-reference/layout-related-objects/layoutblocks)[](/fine-reader/engine/api-reference/layout-related-objects/layout) [Object Diagram](/fine-reader/engine/api-reference/object-diagram) ## Output parameter This object is the output parameter of the [GetAsCheckmarkGroup](/fine-reader/engine/api-reference/layout-related-objects/block/getascheckmarkgroup-method) method of the [Block](/fine-reader/engine/api-reference/layout-related-objects/block) object. ## See also [Block](/fine-reader/engine/api-reference/layout-related-objects/block) [CheckmarkBlock](/fine-reader/engine/api-reference/layout-related-objects/checkmarkblock) [Working with Layout and Blocks](/fine-reader/engine/guided-tour/advanced-techniques/working-with-layout-and-blocks) [Recognizing Checkmarks](/fine-reader/engine/guided-tour/advanced-techniques/recognizing-checkmarks) [Working with Collections](/fine-reader/engine/guided-tour/advanced-techniques/programming-aspects/working-with-collections) [Working with Properties](/fine-reader/engine/guided-tour/advanced-techniques/programming-aspects/working-with-properties)