Tomateche
How can I customize two new shortcuts: Scale -1 on X and Scale -1 on Y?
It could be a huge time saver for my workflow.
Unfortunately, it is not currently possible to create such customized shortcuts. However, if you keyed the Scale X -1 Scale Y -1 on a bone, you can quickly flip the other bones by copying and pasting that key, so it usually shouldn't be too hard to do without the shortcut. Perhaps you might want to have your skeleton have a bone just to store that Scale X -1 Scale Y -1 key.
And bonus question: Is it possible to scale/rotate/translate an entire slot (not the bone), with all its attachments even those that are not visible?
As for scale alone, you can change the scale value when importing JSON exported from your image editor like Photoshop to change it all at once:
http://esotericsoftware.com/spine-import#Scale
As for rotation and translation, if you don’t use bones, it should not be possible to modify all attachments, including even inactive attachments. For our reference, could you tell us why you don't want to use bones for that purpose?
