Signature control in offline-enabled, constellation based mobile app

General
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Hey folks,

If you’ve been around for a while, you probably remember the old answer to “can I capture a signature in my Constellation mobile app?” - “sorry, not supported.” I gave that answer myself more times than I’d like to admit. That’s no longer true.

Signature capture lives as a ready-to-use Constellation DX component in the open-source UI Gallery.

What changed

The key addition on Pega Infinity '26.1: DX components are now packaged for offline use — fully functional without a connection, syncing automatically when back online.

How to add it

Install the component (one-time):

  1. Download the RAP from the Releases page.
  2. Import it via Configure menu → Application → Distribution → Import.
  3. Add the ruleset to your app. In your app definition, add ConstellationUIGalleryLib:01-01-01 to application rulesets.
  4. Enable the component. Go to App → Records → User Interface → Component Library (or search for Component Library in Configure menu), open Pega_Extensions, and check SignatureCapture in the first (unnamed) column. Wait a few seconds, then Actions → Refresh to confirm.
  5. Re-login.

Add it to your case:

  1. Create a text property to store the signature. Set a large MaxLength under Advanced — signatures are stored as base64-encoded images, so the default won’t cut it.
  2. Add the field to your view and set Display As → Signature Capture. No Display As option means step 4 didn’t take — go back and check it.
  3. Save.

No mobile-specific work needed. Set up your mobile channel once as normal; after that, adding the signature control to a view is identical to the web — no rebuild, no extra config.

Offline support

Components are packaged and stored on-device after the first sync. Field users can draw their signature and complete assignments without a network connection; submissions queue and sync automatically when back online. That’s exactly what you need for field service, inspections, and deliveries — where signatures are most common and networks least reliable.

Things to keep in mind

  • This isn’t out-of-the-box (OOB) — it comes from the gallery, so treat it as a dependency.
  • The gallery signature control is fully offline-safe. For other custom or imported components, test offline before shipping.

If you’ve been waiting on signatures in mobile — go try it and let me know how it goes in the comments!

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