@ipopon Hey. Well this has been proposed before, but thank you for your input.
Right now there are three ways I can think of as a workaround that can be used while we get such feature:
The hard way: Using the selection tool, select the warrior and then with the move tool (black arrow) resize the character in every frame.
The weird way: Export an image sequence of the warrior at their current size (with transparency to avoid exporting the white bg), and then use other software to batch-resize each drawing (there’s image magick command line tools if you’re an advanced user)
The easy way (with a catch): You can use the camera layer. Select the camera layer and zoom out to make the warrior seem smaller in general. You can keyframe the camera too in case there’s a mismatch between drawings as well. Note this will affect ALL the animation, not just the warrior, so you could probably combine this with the export idea.
So zoom out, export a png transparent sequence. Reset the camera (press CTRL+H with the camera layer selected) and then re import the warrior as an image sequence on a new layer to continue drawing everything else at the right size.
Hopefully in the future we also get a selection/ area based timeline-scope transformation feature like in TVPaint, but for now these are the workarounds I can think of