In Adobe Sign, when a keyboard or AT user activates the Customize Field control, a dialog appears on the left-hand side of the screen (Customize Field dialog). Keyboard focus does not reliably move to this dialog - it appears to land on Required Field, but pressing tab returns the users to navigating through fields. Keyboard users are not able to access the customize field controls as navigating to them via TAB and Shift+Tab changes the selected field, thus altering the contents of the customize field dialog.