List of all unused hotkeys/shortcuts in Photoshop

My goodness that would be a handy thing to have.  I take the view that there basically are no unused shortcuts.  The thing is, not to care about it, because you can overwrite some of the existing shortcuts, and save them in Custom Workspaces.  If you need the default shortcut, switch back to Essentials.  

There is a wee shortcut goldmine that you might make use of, that being the Funtion keys.  The defaults for the F keys are either redundant, or not useful unless you are using a laptop with a small screen.  You can use short Actions and trigger them with (example) F2, Ctrl F2, Shift F2, Ctrl Shift F2.  I use F5 to set and reset my triple monitor workspace, and F6 to to switch to a modified Essentials.  It never gets old having panels spread haphazedly about the screen(s) and having it tidy up with a single key press.

I am currently taking this a step further having just bought the Logitech G515 keyboard.  Anyone who has used any of the gaming keyboards with G-keys and apps like G-Hub, Synapse and iCue will know you can remap the G-keys to custom macros. Those macros can be shortcuts, scripts, or character strings.  These are app specific.

Well the G515 lets you remap every single key.  I am in the process of mounting the G515 above and behind my main Corsair K95 keyboard.  There is no problem having two keyboards btw.  Least ways not with Windows 11. It accepts input from either keyboard.   I have tested this to make sure, and it works perfectly.  I'll share what I have done when finished if anyone is interested.    I have been doing this with the Function keys for a while, mostly for functions hidden in drop down menus like convert to smart object, new smart object via copy, rasterize layer, Trim etc. etc.

Most apps including AfterEffects can show you clearly what is available.

By @AlEdRTE

After Effects and the other Adobe video apps use the newer, visually oriented, and much more capable and flexible Keyboard Shortcuts dialog box. The main problem here is that Photoshop is one of the apps that still uses the older Keyboard Shortcuts dialog box that dates back to (I think) the 1990s. 

Last year, Adobe Bridge switched over and adopted the visual Keyboard Shortcuts dialog box. But Photoshop, Illustrator, and InDesign are still doing it the old way. If those product teams can be convinced (through, for example, a feature request that gets a lot of votes) that switching to the more modern Keyboard Shortcuts dialog box should be a higher priority than other potential enhancements, maybe this will become easier to do in the future.

Here's a list of the default keyboard shortcuts in Photoshop:

https://helpx.adobe.com/photoshop/using/default-keyboard-shortcuts.html