Start with the input action the person can repeat comfortably: keyboard settings can change how keys register, a customizable mouse supports pointer control, and switch access scans selectable items. Microsoft's Adaptive Hub supports up to four wireless buttons and has five 3.5 mm switch ports, while Apple Switch Control can work with one or more switches. Match the access method to the operating system, apps, connector and mounting setup before buying hardware.
Choose the input method around what the person does on a computer: typing, moving a pointer, selecting screen items or sending repeated commands. Start with the computer’s built-in access settings, then add a device when a particular task still needs a different control.
Compare three ways to interact
| Input route | What it changes |
|---|---|
| Keyboard and built-in settings | Keeps physical or on-screen typing, with settings that can change multi-key commands, key sensitivity or how focus moves. |
| Customizable mouse | Keeps pointer control while changing the shape, support or position of the device. |
| Button or switch access | Assigns direct actions or scans selectable screen items using one or more switches. |
Windows includes Sticky Keys, Filter Keys and the On-Screen Keyboard. Apple describes Full Keyboard Access for navigating an iPhone with an external keyboard, and Switch Control for selecting screen items with one or more switches. Try those settings with the target device and app before adding an adapter.
Match the hardware to the movement
For pointer work, compare the mouse’s body shape, tail or palm support, left/right configuration, buttons and connection method. Microsoft’s Adaptive Mouse can be used by itself or with its separately sold tail and thumb support; the thumb support can switch sides.
For a direct button action or switch-scanning setup, check the number and connector type of inputs, the app’s support for accessibility control, and whether a hub is needed. Microsoft’s Adaptive Hub pairs with wireless buttons and wired switches. AbleNet’s Hitch 2 is a USB computer switch interface with inputs for up to five switches or one joystick with a 9-pin D connector. Those figures describe the named models; other interfaces use different ports and requirements.
Plan the setup around daily tasks
Write down the applications, device, operating system and tasks the person wants to complete. Try a sample task such as opening a document, composing a message, selecting a link or moving between controls. Check reach, fatigue during a typical session, the available mounting space and what happens when the computer is moved.
If screen display is also a barrier, compare video and handheld magnifiers. For a chair-mounted setup, see folding and rigid wheelchair frames and wheelchair measurements; frame and seat dimensions can affect where a device can be positioned. Browse tech and communication access.
Sources
Common questions
Can computer accessibility settings replace new hardware?
Sometimes. Windows includes Sticky Keys, Filter Keys and an on-screen keyboard, while Apple devices include Full Keyboard Access and Switch Control. Try the relevant built-in settings with the actual task first.
What is switch scanning?
The screen highlights available items in sequence, and the user activates a switch to select or move through them. The supported actions depend on the operating system and app.
Does a programmable switch work by itself?
It may need an operating-system feature, switch interface, hub or compatible app. Check the exact connector, software and device requirements for each part.
Can an adaptive mouse be used without its accessories?
Microsoft describes its Adaptive Mouse core as usable on its own. The tail and thumb support attach to that specific mouse and the thumb support can switch sides.