Auxiliary inputs
Overview
The primary way you provide input via the tablet is via the pen.
However, some drawing tablets have other built-in ways of providing input.
Buttons (both physical and capacitive)
Dials
Touch-sensitive strips and wheels
Termionilogy
ExpressKeys is a Wacom-specific term for buttons on Wacom tablets. However, many people have adopted it as a term to describe use to describe buttons on tablets from all brands.
Huion calls buttons "Press Keys"
Disabling Auxiliary inputs
Some people love using these kind of inputs, but some people do not like them because either they
take up space on the tablet
are accidentally triggered
or their workflow just doesn't benefit from them
For these cases, you should be aware that these inputs can often be configured in the tablet driver to "do nothing".
Actions
You can map the buttons to take a variety of actions. Broadly the categories are
Mouse-related actions - right click, left-click, double click
System navigation - scroll left, scroll right, zoom in/out, pan, switch applications
System tasks - run application, open a file
Keyboard - Press a key, hold down a modifier key
Global vs application configuration
Tablet drivers also let you configure how these auxiliar inputs work depending on the app you are using.
For example you can set a button to
Increase brush size when you are using Photoshop
Increase opacity when you are using Clip Studio Paint
Increase the volume of your speakers under all other conditions
Common useful assignments
Buttons
Undo | Redo
Zoom In | Out | to 100% | Zoom to Fit
Increase | Decrease brush size
Increase | Decrease burhs opacity
Rotate Left | Right | Reset to 0 degrees
Switch between tools (brush, eyedropper, etc.)
Select All | None | Invert | Lasso selection | color similarity selection
Go to layer above | below
Display toggle
Precision mode
Pan/Scroll
Rotary dials
These are great for "paired" tasks
Zoom In / Out
Increase / Decrease brush size
Increase / Decrease brush opacity
Rotate canvas
Some rotary dials support turning as well as a third press action. This is useful for a situations where there are three related actions such as rotate right, ritate left, and reset rotation.
Default settings
Wacom Intuos Pro PTH-660
Examples
Wacom Intuos Pro Large PTH-860
Huion Inspiroy Dial2 (Q630M)
Example UI from Wacom Tablet Properties App
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