Accessibility properties for canvas apps

Configuration of properties that aid alternative ways of interacting with controls suitable for users with disabilities.


AccessibleLabel – Label for screen readers. An empty value for Image, Icon and Shape controls will make the controls invisible to the screen reader and treated as decorations.

Live – How screen readers should announce changes to content. Available only in the Label control.

  • When set to Off, the screen reader doesn't announce changes.
  • When set to Polite, the screen reader finishes speaking before announcing any changes that occurred while the screen reader was speaking.
  • When set to Assertive, the screen reader interrupts itself to announce any changes that occurred while the screen reader was speaking.

Learn how to announce dynamic changes with live regions.

TabIndex – Keyboard navigation order in relation to other controls.

Default value of zero specifies default tab order, based on control's XY coordinate. Setting a value higher than zero will move the control's tab order ahead of all controls with the default values. A control with TabIndex value of 2 will precede one with TabIndex of 3 or higher when tabbed.

Note that containers such as Form and Gallery controls will always tab through all elements of the container before proceeding to controls outside of the container. The container's tab order is that of the lowest value TabIndex of a child control.

Setting TabIndex to -1 will disable tab access to the control; in case of Images, Icons and Shapes, they will be made non-interactive elements.