Settings opens from the menu bar item, Settings. The window is sized to the screen it opens on. The sidebar lists eight panes: Desktops, Switching, Voice and On Screen under Using DeskSay, Automations and Time Tracking under Extras, then General and Licence.
Desktops
One row per desktop, grouped by display, with that display's current desktop named in the header. For what names, icons and colours do, see naming a desktop.
One row per desktop
Choose an icon
Opens an icon search; pick a symbol, or No icon.
Desktop colour
Sets the colour the Board and menu draw.
Name
1 to 40 characters, unique per display.
Aliases, comma separated (what else you might say)
Up to 10 other words for the same desktop.
Shortcut that switches straight to this desktop
Records a key for this one desktop.
Dim
Hides it from the menu bar indicators, keeping its name.
Remove name, aliases, icon, colour and shortcut
The cross at the end of the row clears all five.
More than one display
Both appear only with more than one display connected.
Displays
Independent, the default, keeps each display separate; Linked joins a desktop on one screen to one on another. See more than one display.
Linked desktops
Not linked
What each picker reads until you choose a partner on that display.
New desktop called "X"
Adds a desktop on the other display and links it.
Link the ones that already have the same name on both displays
Links every pair already sharing a name.
Named desktops that are not present right now
Removed desktops, or ones on a display that is not connected. Names, aliases and notes are kept.
Assign to…
Puts the kept name on a desktop that has none.
Delete
The trash removes the orphan.
Switching
Every way to move between desktops. See switching.
How a switch happens
Instant switching
Changes the desktop without the animation. Needs Accessibility.
Return the pointer afterwards
Moves the pointer to the target display, then puts it back.
Shortcuts
Listen for a desktop name
Starts listening. Press again or Escape to cancel.
Open the Board by tapping a chord
Tap two modifier keys together, with nothing else, and release.
Chord
Which two keys that is.
Use the Mission Control key (F3) for the Board
F3 opens the Board. Control and Up still opens Mission Control.
Board
A key of your own for the Board.
Jump Back
A key that returns to the previous desktop.
Hover the notch
Reveal the desktop strip by hovering the top of the screen
A strip of that screen's desktops appears. Click one to switch.
Built-in display only
Limits the strip to the Mac's own screen.
Drag to move
Move a window to another desktop while dragging it
Hold the key while dragging and a drop surface appears. Needs Accessibility.
Key to hold
Option, Shift or Control.
Drop the window on the Board
On, the Board; off, a one-row strip at the top.
Press Option once to keep the surface open, instead of holding
Pins the surface rather than holding the key. The label names the key you chose.
Per-desktop shortcuts live in Desktops, next to each name. Shortcuts macOS already uses, Control and a number for example, are refused with a message.
Desktops on the left, the editor on the right. Automations are beta, and running one needs a licence; setting them up does not.
Add automation…
Adds one to that desktop.
Name
What this automation is called.
Trigger
On Enter, On Exit or On Click, explained under the picker.
Enabled
Whether it runs.
Actions
The list, in the order they run.
Add
Adds the action chosen beside it: Open app (bundle id), Open file or folder, Open URL, Run Shortcut, Run shell command, Pomodoro 25/5 or Start session.
Run now
Runs it once, without switching.
Delete automation
Removes it.
An automation containing a shell command says so in the editor. DeskSay shows scripts in full before the first run.