Rafał Lalik authored Apr 26, 2021 and Albert Astals Cid committed Apr 26, 2021

The scaling slider allows to scale between 'original size' and
'fit to window'. 'Original size' corresponds to previous 'Scale'
 action off. With 'Scale' enabled, additional slider widget (must
be add to visible widgets from ToolBar settings) the slider allows
to adjust scale size in 100 steps.