Hello asepriters! 
After several months we’re preparing the first release candidate to finally move forward to v1.3 (and leave v1.2 behind 
). If everything goes well (and probably with a couple of extra release candidates) we will finally put v1.3 in the main channel (and the beta channel will be used to bring new features quickly).
A list of changes and fixes in this v1.3-rc1:
- Prefer native file dialog by default on Windows & macOS #3615
- macOS: Added a QuickLook plugin to generate thumbnails and previews #834
- macOS: Fixed shortcuts for Edit actions when the native file dialog is displayed
- You can switch back to the Aseprite file dialog unchecking the Edit > Preferences > Experimental > Use native file dialog option
- Disabled multiple UI windows by default #3556
- You can re-enable it from Edit > Preferences > General > User Interface or Edit > Preferences > Experimental > UI with multiple windows
- Added support to load/save QOI files #3121
- New “Copy Path” option right-clicking a tab
- New Repeat field to animation tags #1740 #1275 t/3964 t/4227
- Added option to play/preview with subtags & repetitions
- Show saved undo state in Edit > Undo History window #3578
- CLI: Added support to save multiple files with
--save-as#2442 #3629 t/16491 (thanks to @anGie44) - New tagname format (
--tagname-format) to export JSON data #1514 #3611 (thanks to @natebot13) - Added several missing strings to translate the UI to other languages #2809 (thanks to @iamOgunyinka)
- Optimized save operation on files with several/huge tilesets
- macOS: Fixed memory leak in the regular usage of the program #3592
- Fixed general look of the Dynamics popup + added more possibilities to customize themes #2676 #3519 #3554 #3565
- Fixed normal color wheel #3015 (thanks to @cs-altshift)
- Fixed incorrect BMP file size set during save command #3534
- Fixed generation of non-visible colors using “New Palette from Sprite” #3505
- Avoid color reindexing when duplicate colors in GIF file #3426
- Fixed uninstalling/updating extensions with subdirectories #3385
- Fixed bug where Advanced Mode disabled the Tilemap tool #3478
- Fixed bug when exporting from a sprite with layers that have the same name #2656
- Fixed bug where the FG color changes to the palette entry zero when the eyedropper picks a pixel of mask color #2813
- Fixed spray tool in Indexed mode not handling masked color as expected #3063
- Keep/restore the timeline position for each sprite/DocView #3676
- Fixed
{duration}field for filename format #2998 - Fixed update Preview Window after pasting Frame #2215 (thanks to @Joefish)
- Lua: New API objects like Dialog:canvas() (api#87), GraphicsContext, app.theme, and Timer (#3251)
- Lua: New API to save user & extension properties into objects #3625 #3631 api#88
- Lua: Fixed bug with
app.command.MoveMask()t/10437 (thanks to @behreajj) - Lua: Fixed the Slice properties menu group (thanks to @thkwznk)
- Lua: New ev.fromUndo to detect changes from undo/redo #3539 t/15828
- Fixed other UI bugs: #3274 #3433 #3595 and several crashes including #3504 #3530
This version includes a lot of new scripting capabilities, like the Canvas widget, we hope this will bring new possibilities to extend Aseprite in a near future.
