If Command Button leads to another Screen, and if the user can enter or change details on the other screen then the Text on the button should be followed by three dots. All Buttons except for OK and Cancel should have a letter Access to them. This is indicated by a letter underlined in the button text. Pressing ALT+Letter should activate the button. Make sure there is no duplication. Click each button once with the mouse - This should activate Tab to each button - Press SPACE - This should activate
Tab to each button - Press RETURN - This should activate The above are VERY IMPORTANT, and should be done for EVERY command Button. Tab to another type of control (not a command button). One button on the screen should be default (indicated by a thick black border). Pressing Return in ANY no command button control should activate it.
If there is a Cancel Button on the screen, then pressing
should activate it. If pressing the Command button results in uncorrectable data e.g. closing an action step, there should be a message phrased positively with Yes/No answers where Yes results in the completion of the action.
