--- title: "2021.3 release notes" canonical_url: "https://www.nutrient.io/guides/web/release-notes/2021-3/" md_url: "https://www.nutrient.io/guides/web/release-notes/2021-3.md" last_updated: "2026-08-13T07:22:52.665Z" description: "Discover the latest PSPDFKit 2021.3 update with API renaming from ink signatures to stored signatures, enhancing clarity and usability." --- [PSPDFKit for Web 2021.3](https://www.nutrient.io/blog/pspdfkit-web-2021-3-electronic-signatures/) renames a series of APIs that contained “ink signature” as part of their names in favor of more generic “signature” definitions: - The `NutrientViewer.Configuration#populateInkSignatures` option was renamed to `NutrientViewer.Configuration#populateStoredSignatures`. - The `NutrientViewer.Instance#getInkSignatures` method was renamed to `NutrientViewer.Instance#getStoredSignatures`. - The `NutrientViewer.Instance#setInkSignatures` method was renamed to `NutrientViewer.Instance#setStoredSignatures`. - The `NutrientViewer.InteractionMode.INK_SIGNATURE` value was renamed to `NutrientViewer.InteractionMode.SIGNATURE`. - The `inkSignatures.create`, `inkSignatures.update`, `inkSignatures.delete`, and `inkSignatures.change` events were renamed to `storedSignatures.create`, `storedSignatures.update`, `storedSignatures.delete`, and `storedSignatures.change`. - The `ink-signature` toolbar item, which was part of `NutrientViewer.defaultToolbarItems`, was renamed to `signature`. All of the former APIs will keep working as expected, but a warning will be logged into the console when used. Migrate to the new names since the deprecated ones will be removed as part of the next major release. Signature APIs that previously only supported ink annotations now also support image annotations: - `NutrientViewer.Configuration#populateStoredSignatures` and `NutrientViewer.Instance#setStoredSignatures` now also support using `NutrientViewer.Annotation.ImageAnnotation` instances, along with `NutrientViewer.Annotation.InkAnnotation` ones. They’ll also be presented on the signature picking UI. - `NutrientViewer.Instance#getStoredSignatures` can return `NutrientViewer.Annotation.ImageAnnotation` instances in addition to `NutrientViewer.Annotation.InkAnnotation` ones. - The `storedSignatures.create`, `storedSignatures.update`, and `storedSignatures.delete` events can return `NutrientViewer.Annotation.ImageAnnotation`instances in addition to `NutrientViewer.Annotation.InkAnnotation` ones. For a full list of changes, check out the [changelog](https://www.nutrient.io/guides/web/changelog.md#2021.3). ## Migrate PSPDFKit Server If you use PSPDFKit Server, make sure you read the [2021.3 server migration guide](https://www.nutrient.io/guides/product-archives-and-deprecated-solutions.md). --- ## Related pages - [1 0](/guides/web/release-notes/1-0.md) - [1 1](/guides/web/release-notes/1-1.md) - [1 10](/guides/web/release-notes/1-10.md) - [1 11](/guides/web/release-notes/1-11.md) - [1 12](/guides/web/release-notes/1-12.md) - [1 13 1](/guides/web/release-notes/1-13-1.md) - [1 13](/guides/web/release-notes/1-13.md) - [1 14](/guides/web/release-notes/1-14.md) - [1 15](/guides/web/release-notes/1-15.md) - [1 16](/guides/web/release-notes/1-16.md) - [1 17](/guides/web/release-notes/1-17.md) - [1 18](/guides/web/release-notes/1-18.md) - [1 19](/guides/web/release-notes/1-19.md) - [1 2](/guides/web/release-notes/1-2.md) - [1 20](/guides/web/release-notes/1-20.md) - [1 3](/guides/web/release-notes/1-3.md) - [1 4](/guides/web/release-notes/1-4.md) - [1 5](/guides/web/release-notes/1-5.md) - [1 6](/guides/web/release-notes/1-6.md) - [1 7](/guides/web/release-notes/1-7.md) - [1 8](/guides/web/release-notes/1-8.md) - [1 9](/guides/web/release-notes/1-9.md) - [2017 3](/guides/web/release-notes/2017-3.md) - [2017 6](/guides/web/release-notes/2017-6.md) - [Update your PSPDFKit for Web to version 2017.7](/guides/web/release-notes/2017-7.md) - [Upgrade annotations in PSPDFKit Web 2017.8](/guides/web/release-notes/2017-8.md) - [Explore new features in PSPDFKit for Web 2017.9](/guides/web/release-notes/2017-9.md) - [New features in the 2018.1 migration guide](/guides/web/release-notes/2018-1.md) - [PSPDFKit for Web 2018.2 migration insights](/guides/web/release-notes/2018-2.md) - [Discover the new features in PSPDFKit for Web 2018.3](/guides/web/release-notes/2018-3.md) - [Explore PSPDFKit for Web 2018.4 features](/guides/web/release-notes/2018-4.md) - [Explore new features in PSPDFKit 2018.5](/guides/web/release-notes/2018-5.md) - [Explore PSPDFKit for Web 2018.6 enhancements](/guides/web/release-notes/2018-6.md) - [Explore the new features in PSPDFKit 2018.7](/guides/web/release-notes/2018-7.md) - [Key updates in PSPDFKit for Web 2019.1](/guides/web/release-notes/2019-1.md) - [2019 2](/guides/web/release-notes/2019-2.md) - [PSPDFKit for Web 2019.3 migration highlights](/guides/web/release-notes/2019-3.md) - [Essential updates in PSPDFKit for Web 2019.4](/guides/web/release-notes/2019-4.md) - [PSPDFKit for Web 2019.5 migration insights](/guides/web/release-notes/2019-5.md) - [Key changes in PSPDFKit for Web 2020.1](/guides/web/release-notes/2020-1.md) - [Seamless migration to PSPDFKit for Web 2020.2](/guides/web/release-notes/2020-2.md) - [Upgrade to PSPDFKit Web 2020.3 seamlessly](/guides/web/release-notes/2020-3.md) - [PSPDFKit Web and Server 2020.4 migration update](/guides/web/release-notes/2020-4.md) - [Unified CRUD API enhancements for easy migration](/guides/web/release-notes/2020-5.md) - [PSPDFKit Web 2020.6 migration insights](/guides/web/release-notes/2020-6.md) - [Upgrade to PSPDFKit for Web 2021.1 with ease](/guides/web/release-notes/2021-1.md) - [Seamlessly migrate to PSPDFKit for Web 2021.2](/guides/web/release-notes/2021-2.md) - [PSPDFKit 2021.4 migration guide for seamless updates](/guides/web/release-notes/2021-4.md) - [Migration guide for PSPDFKit 2021.5](/guides/web/release-notes/2021-5.md) - [2021 6](/guides/web/release-notes/2021-6.md) - [PSPDFKit 2022.1.1 migration changes](/guides/web/release-notes/2022-1.md) - [Enhancements in PSPDFKit for Web 2022.2](/guides/web/release-notes/2022-2.md) - [Explore the new features of PSPDFKit for Web 2022.3](/guides/web/release-notes/2022-3.md) - [PSPDFKit for Web 2022.4 migration overview](/guides/web/release-notes/2022-4.md) - [Key improvements in PSPDFKit for Web 2022.5](/guides/web/release-notes/2022-5.md) - [Discover the key updates in PSPDFKit for Web 2023.1](/guides/web/release-notes/2023-1.md) - [PSPDFKit 2023.2 migration and updates](/guides/web/release-notes/2023-2.md) - [Key updates in PSPDFKit for Web 2023.3](/guides/web/release-notes/2023-3.md) - [Explore key updates in PSPDFKit for Web 2023.4](/guides/web/release-notes/2023-4.md) - [Key updates in PSPDFKit for Web 2023.5](/guides/web/release-notes/2023-5.md) - [Essential Nutrient Web SDK 2024.1 migration tips](/guides/web/release-notes/2024-1.md) - [2024 2](/guides/web/release-notes/2024-2.md) - [2024 3](/guides/web/release-notes/2024-3.md) - [2024 4](/guides/web/release-notes/2024-4.md) - [2024 5](/guides/web/release-notes/2024-5.md) - [2024 7](/guides/web/release-notes/2024-7.md) - [2024 8](/guides/web/release-notes/2024-8.md) - [Upgrading Nutrient Web SDK](/guides/web/release-notes/upgrading.md)