dither.lol

S: Side-by-side: original next to the result (or the split-panes button)
G: Gallery: the image through 9 presets (click one to use it)
\ hold: Show the original (hold-to-compare); or hold the eye button
Drag / Wheel: Pan the preview
Shift + Wheel: Pan sideways
Alt + Wheel: Free zoom at the cursor
Space + Drag / Middle-drag: Pan in Crop and Lasso mode (a Space tap still plays / pauses)
+ − 0: Zoom in / out / Fit
Zoom bar ↑↓ HomeEnd: Step zoom / min / max (also wheel)

Wheel on a menu: Step a dropdown or segmented control one option
Double-click slider: Reset it to its default
←→ on a slider: 1 step (position / size: 1 source px) · Shift 10
Shift-drag slider: Fine: 1/10 speed
Double-click a value: Type an exact number (px for positions); Enter sets, Esc cancels
Double-click card header: Collapse / expand the layer card
Shift + + Glow: Add the glow above the Dither layer
Drag vignette handles: Move / resize / rotate the focus
Shift + drag edge handle: Resize keeping aspect
Double-click centre handle: Reset the vignette shape
Click a palette swatch: Replace it (colour picker; Enter applies, Esc cancels)
Right-click a swatch: Disable / re-enable that colour
Sort by lightness: Order the palette dark → light (for Map by order)
Click a dim focus area: Select it (Focus 1…4 tabs; + Focus adds one)
Shift-drag centre handle: Fine move (1/10 speed, whole source px)
←↑↓→ after clicking the preview: Nudge the selected focus area 1 px · Shift 10 px (Focus panel open)

L: Lasso tool on / off
C: Crop: drag handles · Shift keeps aspect · arrows nudge 1 px, Shift+arrows 10 px (Alt+arrows resize) · Enter applies · Esc cancels
Drag: Draw a region
Colours in selection: Click a swatch: recolour it in that region · right-click: disable · Alt-click: revert · click a region row to select it
Alt / Ctrl + drag: Subtract a region
Esc: Cancel the stroke / leave the tool
Ctrl / ⌘ Z: Undo the last region or shuffle

Space: Play / pause (always, unless typing in a text field)
, .: Previous / next frame (video, timeline, animated still; works with a control focused)
I O: Set in / out point
M: Mute / unmute the preview audio

◇ beside a control: Automate it (adds a timeline lane)
K: Keyframe at the playhead
+ Preset lane / ◇ by the preset name: Keyframe whole presets (hard cuts); pick a preset with the playhead parked to key it
Double-click the preset lane: Preset picker for a new key
Wheel on a preset key: Step that key’s preset
Grid + BPM: Keys snap to bars / beats; Rand… fills seeded random cuts
← → / , .: Step a frame (Shift: 10)
Home End: Go to start / end
Space: Play / pause
Double-click lane: Add / delete a keyframe
Drag key: Move in time
Shift + drag key: Change its value
Shift-click / box: Select several keys
Right-click key: Interpolation menu
Del · Ctrl C / V: Delete · copy / paste keys
Ctrl Z · Ctrl Shift Z: Undo · redo keyframe edits
Ctrl / Alt + Wheel: Zoom the timeline (Shift + wheel scrolls)