Yes, it's possible, but I haven't used their file system API as it could potentially introduce bugs. I might add it in the future. However, if you need to customize the default values, you can simply open the script with Notepad or any other text editor. After line 17 (options variables), you can modify the default values and save the file. It's quite straightforward.
Thank you! ❤
Viewing post in Aseprite SpriteSheet Preview Script (Like PyxelEdit) comments
Apologies for the mistake! To ensure the dialog displays correctly, you'll need to modify the dialog values as well. For example, to adjust the Tile Width, edit lines 22 and 158. For Tile Height, modify lines 23 and 173. The names are quite similar, so it shouldn't be too difficult to find the others.
offsetX line 20 and 133
offsetY 21, 144
Length 24, 190
animLooping 25, 205
verticalMode 26, 213