With my recent interest in keyboards and customization of keys, I keep thinking of all the keys on the keyboard I don’t use. The latest keyboard I acquired has an F13 button, and it made me think…what is that doing there? So, I thought I should cover a few keys I question whether or not I really need, and might be able to repurpose.

• Caps Lock – Chromebooks already got rid of the Caps Lock key. On my 40% keyboard, I set Caps Lock using a Tap-Hold function on the Shift key. When you tap the shift key, it triggers Caps Lock, otherwise, holding it is a shift. Double-tap is a common caps lock command on Smartphone keyboards. Also, the key is 1.75u…so even if you keep it, it takes up more space than a traditional key. On a Colemak layout, the Caps Lock position serves as a second backspace key to allow it to be reached by both hands.
• Scroll Lock – This used to be used to change the behavior of the arrow keys, but it is not usually used for that outside of some programs any longer, making it less useful. On one keyboard I have, this was replaced by a microphone mute key.
• Pause/Break – We’re back to….this doesn’t seem to do much on modern computers. On one keyboard I have, this was replaced by a control key for the lighting.
• Num Lock – Num lock locks the keypad to numbers. Without it, the keypad can act as arrows, as well as having functions for home, end, insert, delete, page up and page down. Things pretty much every keyboard with a built in number pad already has.
• Menu Key – Also known as the Application key, it has been used to launch a context menu with the keyboard, as opposed to a right mouse click. Microsoft recently decided to start replacing this with a Copilot or Search button.
• Function Keys – Most keyboards has F1-F12. Macs remap these to media keys, which are often a secondary function on Windows systems. But computers actually support up to 24 function keys…thus my weird F13. These can be mapped in software to trigger operating system functions and are often used by default by software.. But, you can also just lock them to the media functions if you want to.

This doesn’t factor in the ANSI layout popular in the US with the alternate ISO layout popular in Europe. On the ISO keyboard, the Enter key is a larger L shaped key, the left shift is smaller to make space for another key, the right Alt is often replaced by a key to support additional languages, and the extra long backslash key is gone.

On many keyboard formats, some of these keys are omitted and generated using combinations of other keys. So, is this just a pointless exercise? I don’t think so. So many new keyboards still have all these keys, and they are sitting there, and you might as well use them for something, if not their original intention.

In a previous post, I briefly mentioned QMK and VIA.

QMK is compiled firmware for supported keyboards. This allows you to load firmware with custom functionality and maps onto a keyboard. This allows you to customize nearly every aspect of the keyboard’s behavior. So, what is VIA? VIA is a feature in QMK that lets you change your keymap on your keyboard without needing to reflash firmware. Some keyboards, Epomaker ones come to mind, have implemented VIA support without QMK…or at least possibly violating the open source license of QMK. I could live with that, I’m not an open source purist, but their implementation is also frequently incomplete and buggy.

There is also a fork of Via called Vial, which requires porting firmware to include support for additional QMK firmware features in software.

The advantage of all of these options is you can reprogram and customize the behavior of your keyboard and save it to the keyboard…making it independent of any computer. Many keyboards provide driver software that can do ‘some’ of the same things, but they are also only for Windows. I’m a Linux user, so I’m often out of luck there. Linux does have some key remapping options, but my current recommendation is a very low level option called keyd. It remaps keys at that level, and supports a lot of the features that you usually need QMK for. Keyd supports multiple keyboards with different layouts, modifying based on the USB vendor ID of the keyboard, and always you to remap any key combination and even add layers.

So, let’s dig into some of the features. Layers are built into most keyboards using the FN key…when you press it, this allows for different keys. Layers are essentially overlapping keyboard maps, which can be triggered. The Mac/Windows toggle on your keyboard, if you have one, toggles between two keyboard maps. The FN key activates a new layer when it is held. I have coded something in QMK to actually change the backlight color of a keyboard to indicate what layer was activated.

QMK/VIA allows the following sorts of behaviors to be triggered by keypress

• Change the default layer
• Activate layer when key is held
• Activates layer when held, keypress when tapped
• Activates layer until next key is pressed
• Toggle the layer on/off
• Tap the key 5 times to lock the layer in place.

Increasingly, discerning keyboard users are demanding this feature on keyboards. I wrote about the budget C3 Pro from Keychron, which is a full QMK/VIA supported TKL. The other budget option I found was the Skyloong GK61 60% hotswappable QMK/VIA keyboard. Budget as in, under $50. The 50-100 market is getting options as well. This shouldn’t be a luxury feature, and increasingly it isn’t.

My layer needs are very simple. I have a 75% keyboard which has Delete, Page Up, and Page Down on the right side…which means no Home, End, Insert. The 75% profile is not consistent about what keys will be offered in the format factor. With a QMK/VIA keyboard, I could make those keys whichever ones I wanted, change the keycaps…and it would behave that way forever. This keyboard though, doesn’t have that…so I’m using the keyd daemon…which of course means if I move to another computer, it no longer works.

The icing on the cake for these options are macros. The ability to trigger sequences of entries. And again, with QMK/VIA can be stored in the keyboard itself.

So, why not check this out? And here’s hoping more manufacturers include the option.

In order to learn more about assembling keyboards, I’ve been buying a series of budget keyboard equipment. In a previous post, I had talked about buying a barebones TKL keyboard in the mid twenty range and filling it with switches and keycaps. More recently, I found myself stumbling across these $20 hefty barebones 75% keyboards, which I’d share the link to if it hadn’t sold out and been delisted rather quickly. It seems to be older stock someone was clearing out, which is a lesson that you can get some reasonable deals if you hunt around Amazon. Some people prefer something like Aliexpress, because certainly you can get some good deals drop-shipped from China, but I find Amazon has a bit more payment protection.

The switches I tried in my previous post were silent linear switches, but there are also silent tactile. Tactile switches provide a bump through the keystroke, which many individuals prefer, especially those who type a lot.

To evaluate switches of the same type, we need a few more terms. Actuation or operating force is the amount of force needed to activate the switch. Lighter switches may allow for fast registering of keypresses, but they can also increase mistakes due accidental triggering of a key. Heavier switches may reduce accidental keypresses, and can also cause fatigue after long typing sessions. The pre-travel is the distance the switch travels before it is pressed.

I explored a few switches. The Gamakay Pegasus Silent Pegasus Switches, which has a 50g actuation force and 2mm pre-travel. It is reasonably priced at well. Then I checked out the Outemu Silent Yellow Jade Switch, which is even less expensive, and also has a 50g actuation force, but a 3.3mm travel. There are also ones that require less force, for example, the Outemu Lime. Force is a matter of preference. I’ve found the Silent Yellows feel better to me.

Trying out switches is an endless road of preference. There are multiple vendors, multiple types(we didn’t even get into clicky as they aren’t silent deliberately), and a variety of opinions. Today, I’m enjoying the Silent Yellow Jades, tomorrow, I may try something different.