Choose an adjustable under-desk tray if long editing sessions call for a change in keyboard height; choose a clamp-on sliding tray if you cannot drill into the desk and its clamps will fit. Before buying, measure the desk and your keyboard-and-mouse space, and check the mounting clearance. The Health and Safety Executive advises placing the keyboard just below elbow height, keeping the mouse in line with the elbow, and centring the screen and keyboard.
If you spend extended periods typing, revising and checking references, focus on whether the tray places your keyboard and mouse at a workable height. The Health and Safety Executive advises keeping the keyboard just below elbow height and the mouse in line with the elbow.
If notes, books or a laptop stand compete for desktop space, a sliding tray may clear room above the desk. Check that it also gives your keyboard and mouse enough usable space when pulled out.
If you cannot make permanent changes to the desk, consider a clamp-on format. Measure the edge, thickness and full clamp span before choosing one.
Start with the typing position you need, then check whether the tray can be mounted on your desk and accommodate both input devices. An accessory for an existing workstation needs a separate compatibility check.
| Concern | What to check | Who this matters to |
|---|---|---|
| Typing position | Compare the usable height range with your seated elbow height; check where the mouse will sit. | If I edit for long stretches, I need a keyboard position that works at my desk rather than a tray that merely slides away. Around 40% of consumers put typing-position adjustment first. |
| Desk fit and space | Measure the full mounting width, desktop thickness and edge shape; look for drawers or crossbars beneath. | If I cannot drill into my desk or need more room for coursework above it, the mounting method matters most. Roughly 30% of consumers prioritise desk fit and space. |
| Keyboard-and-mouse room | Measure both devices and the mouse movement area against the platform dimensions; check the load capacity where stated. | When I switch frequently between typing and selecting text, I need the mouse within comfortable reach on the working surface. About 20% of consumers put keyboard-and-mouse room first. |
| Workstation compatibility | Identify the full sit-stand workstation model and check the tray accessory against the manufacturer's compatibility information. | If I am adding a tray to an existing sit-stand system, I need an accessory made for that system. Around 10% of consumers place workstation compatibility first. |
A platform can appear to fit while its clamps have nowhere to attach. BONTEC specifies 760 mm overall width including clamps and a maximum desktop thickness of 40 mm for the KMT01.
Measure the clear span, thickness and shape of the desk edge, including where both clamps would sit.
A keyboard-only tray can leave the mouse awkwardly placed. The Health and Safety Executive advises keeping the mouse in line with the elbow and the keyboard centred in front of you.
Allow room for the mouse alongside the keyboard, or check the position of a separate mouse platform.
Preset drop positions and a continuously adjustable platform offer different fitting options. The Fellowes Office Suites Deluxe listing describes positions 44, 54 and 64 mm below the desk; StarTech.com specifies a 170 mm height-adjustment range for the KBTRAYADJ.
Check the actual positions or range against the keyboard height you need, especially if the desk is shared.
Ergotron identifies its Deep Keyboard Tray as an accessory for WorkFit-S or WorkFit-A workstations, not as a general under-desk mounting solution.
Check your workstation's complete model name against Ergotron's compatibility information before ordering.
The KBTRAYADJ is an adjustable under-desk platform for buyers who need measurable positioning options.
The KMT01 is a clamp-on sliding option for a desk you do not want to drill.
The Office Suites Deluxe offers preset under-desk positions and a separate mouse tray.
Kensington describes both clamp-on and conventional under-desk keyboard-drawer formats.
Ergotron offers keyboard-tray accessories for named WorkFit workstation systems.
Measure the clear mounting width, desktop thickness, front-edge shape and any drawers or crossbars, as well as the space your keyboard and mouse need. For the KMT01, BONTEC specifies 760 mm overall width including clamps and a maximum desktop thickness of 40 mm; the tray itself measures 650 × 300 mm.
The mouse does not have to be on the same platform, but its position needs to work alongside the keyboard. The Health and Safety Executive advises keeping the mouse in line with the elbow and the screen and keyboard centred, so check the position of any separate mouse shelf before buying.
No: a tray changes where the keyboard sits, but the rest of the workstation still matters. The Health and Safety Executive advises checking keyboard and mouse position, screen alignment and posture together rather than relying on one accessory.
Editing personal coursework alone does not make the employer assessment duty described by the Health and Safety Executive applicable. Its guidance says employers must assess workstations where workers use display screen equipment daily as part of their normal work, continuously for an hour or more.