Settings

Every setting in pxstud.io: where to change it, its values, its default and where it's kept.

Most settings are in the Settings menu and the View menu, and a few sit next to what they change (the color picker's own settings button, the timeline's playback controls). Tool options have their own reference.

Settings are kept in one of these places, shown in each table's Kept column:

This browser, every sprite: saved in this browser and the same for every sprite. Another browser or device has its own. A saved workspace layout can carry some of them, as noted under their tables.
Each sprite, in this browser: each sprite has its own, saved in this browser.
In the sprite file: part of the sprite, so it's saved and synced with it and undo covers it.
Each editor view: each editor (View > New Editor) has its own, until you reload.
Until you reload: shared by every view and back to the default when the page reloads.

Appearance

Setting	Where	Values	Default	Kept	What it does
Theme	The theme button at the right end of the menu bar	Match system, Light, Dark	Match system	This browser, every sprite	Light or dark, or whichever your system uses; every page of pxstud.io follows it.

A saved workspace layout can carry these: Theme.

Keyboard shortcuts

Setting	Where	Values	Default	Kept	What it does
Keyboard shortcuts	Settings > Keyboard Shortcuts...	Any keys for any command, or none	The defaults	This browser, every sprite	Changes, adds or removes the keys for any command or tool.

A saved workspace layout can carry these: Keyboard shortcuts.

How to change them is in Keyboard shortcuts.

View

Setting	Where	Values	Default	Kept	What it does
Pixel grid	View > Grid > Show Pixel Grid	On or off	Off	Each editor view	Outlines every pixel when you zoom in far enough.
Tiled mode	View > Tiled Mode	Off, Both axes, Horizontal only, Vertical only	Off	Each editor view	Repeats the sprite around itself, to check that it tiles; you can paint across the copies.
Onion skin	View > Show Onion Skin	On or off	Off	Each editor view	Shows the frames around the current one, faded, as set in the onion skin settings.
Tile grid	View > Tile Grid	On or off	On	Until you reload	Outlines the tiles while a tilemap layer is active.
Brush preview	View > Show Brush Preview	On or off	On	Until you reload	Shows the brush's footprint under the pointer, or the Spray's splash circle.
Zoom snapping	Settings > Zoom Snapping	Off (smooth), Whole numbers, Powers of two	Whole numbers	This browser, every sprite	Whole numbers keeps every pixel the same size on screen, on Aseprite's levels (1x, 2x, 3x, 4x, 5x, 6x, 8x, 12x ..., and 1/2, 1/3 ... below 100%); powers of two zooms ... 1/2, 1x, 2x, 4x ...; off zooms smoothly.

Touch and pen

For drawing on a tablet or touch screen. A pen's eraser end always switches to the Eraser while you use it (see Tools).

Setting	Where	Values	Default	Kept	What it does
Draw with finger	Settings > Draw with Finger	On or off	On	This browser, every sprite	When off, one finger pans the canvas instead of drawing, so only a pen or mouse draws; pinching and two- and three-finger taps work either way.

Mouse and trackpad

What the mouse, its wheel and a trackpad do on the canvas; The workspace explains them. Commands bound to mouse buttons and wheel directions are kept with the keyboard shortcuts.

Setting	Where	Values	Default	Kept	What it does
Mouse wheel	Settings > Mouse and Trackpad...	Zoom, Scroll the view	Zoom	This browser, every sprite	Zoom: the wheel zooms and a trackpad's two-finger scroll pans. Scroll the view: the wheel pans (Shift+wheel sideways) and Ctrl+wheel (⌘+wheel on a Mac) zooms. A trackpad pinch zooms either way.
Zoom around	Settings > Mouse and Trackpad...	Pointer, Center of the view	Pointer	This browser, every sprite	Whether wheel and trackpad zoom keeps the point under the pointer still, or the middle of the view.
Invert brush-size wheel	Settings > Mouse and Trackpad...	On or off	Off	This browser, every sprite	Ctrl+Shift+wheel (⌘⇧+wheel on a Mac) changes the active tool's size, wheel up for bigger; this makes wheel up smaller, as in older Aseprite.
Right button	Settings > Mouse and Trackpad...	Tool's right-click (background color), Erase while held, Pick color while held, Pan the view	Tool's right-click (background color)	This browser, every sprite	What a right-button drag on the canvas does: the tool's own right-click (most paint with the background color), erase, pick a color, or pan. A pen's side button counts as the right button.
Back and forward buttons open the tool wheel	Settings > Mouse and Trackpad...	On or off	On	This browser, every sprite	Hold the mouse's back or forward button over the canvas to open the tool wheel, and let go over a tool to pick it; the browser doesn't go back.
Cursor size	Settings > Mouse and Trackpad...	100%, 150%, 200%	100%	This browser, every sprite	Draws the pixel cursors at 150% or 200%, still crisp, for big or dense screens.

Tools

Setting	Where	Values	Default	Kept	What it does
Remember brush per tool	Settings > Remember Brush per Tool	On or off	On	This browser, every sprite	Each tool keeps its own brush size, shape and ink, so switching back to a tool brings back what it last used; when off, every tool shares one brush.
Hold tool keys to borrow	Settings > Hold Tool Keys to Borrow	On or off	Off	This browser, every sprite	Tap a tool's key to switch to it; hold the key for a moment and the tool is only borrowed, so letting go returns you to the tool you had (hold E to erase, release to carry on with the pencil).
Tool wheel: inner ring	Settings > Tool Wheel...	Up to eight tools, in slots you choose	8 tools	This browser, every sprite	The tools on the ring nearest the pointer, the easiest to reach; slots may stay empty.
Tool wheel: outer ring	Settings > Tool Wheel...	Up to eight tools, in slots you choose	8 tools	This browser, every sprite	The tools on the ring behind the inner one, turned half a slot so each sits between two inner tools; slots may stay empty.